Add production dependencies

2022-01-21 09:28:41 +01:00 · 2022-01-21 09:28:41 +01:00 · 579ccdc29f
commit 579ccdc29f
parent 5a0114f3e2
12113 changed files with 978046 additions and 3 deletions
--- a/node_modules/gulp-concat-css/.travis.yml
+++ b/node_modules/gulp-concat-css/.travis.yml
@ -0,0 +1,5 @@
+language: node_js
+node_js:
+  - "0.12"
+  - "0.10"
+  - "iojs"
--- a/node_modules/gulp-concat-css/LICENSE
+++ b/node_modules/gulp-concat-css/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Mario Casciaro
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/gulp-concat-css/README.md
+++ b/node_modules/gulp-concat-css/README.md
@ -0,0 +1,44 @@
+# [gulp](https://github.com/wearefractal/gulp)-concat-css
+[![Build Status](https://secure.travis-ci.org/mariocasciaro/gulp-concat-css.png?branch=master)](https://travis-ci.org/mariocasciaro/gulp-concat-css)
+[![NPM version](http://img.shields.io/npm/v/gulp-concat-css.svg)](https://www.npmjs.org/package/gulp-concat-css)
+[![Dependency Status](https://david-dm.org/mariocasciaro/gulp-concat-css.svg)](https://david-dm.org/mariocasciaro/gulp-concat-css)
+[![Downloads](http://img.shields.io/npm/dm/gulp-concat-css.svg)](https://www.npmjs.org/package/gulp-concat-css)
+
+> Concatenates css files, bubbling up @import statements (as per the [standard](https://developer.mozilla.org/en-US/docs/Web/CSS/@import)), and optionally rebasing urls and inlining local @import statements.
+
+## Install
+
+Install with [npm](https://npmjs.org/package/gulp-concat-css).
+
+```
+npm install --save-dev gulp-concat-css
+```
+
+## Examples
+
+```js
+var gulp = require('gulp');
+var concatCss = require('gulp-concat-css');
+
+gulp.task('default', function () {
+  return gulp.src('assets/**/*.css')
+    .pipe(concatCss("styles/bundle.css"))
+    .pipe(gulp.dest('out/'));
+});
+```
+
+**TIP: for a proper import inlining and url rebase, make sure you set the proper `base` for the input files.**
+
+## API
+
+`concatCss(targetFile, options)`
+* `targetFile`: The relative path of the generated file containing the concatenated css
+* `options`: (since 2.1.0)
+    * `inlineImports`: (default `true`) Inline any local import statement found
+    * `rebaseUrls`: (default `true`) Adjust any relative URL to the location of the target file.
+    * `includePaths`: (default `[]`) Include additional paths when inlining imports
+    * `commonBase`: (default to the `base` property of the first file) Common base path from wich resolving files and urls
+
+## License
+
+[MIT](http://en.wikipedia.org/wiki/MIT_License) @ Mario Casciaro
--- a/node_modules/gulp-concat-css/index.js
+++ b/node_modules/gulp-concat-css/index.js
@ -0,0 +1,136 @@
+'use strict';
+var PluginError = require('plugin-error');
+var Vinyl = require('vinyl');
+var path = require('path');
+var rework = require('rework');
+var reworkImport = require('rework-import');
+var through = require('through2');
+var parseImport = require('parse-import');
+var reworkUrl = require('rework-plugin-url');
+var defaults = require('lodash.defaults');
+
+module.exports = function(destFile, options) {
+  var buffer = [];
+  var firstFile, commonBase;
+  var destDir = path.dirname(destFile);
+  var urlImportRules = [];
+  options = defaults({}, options, {
+    inlineImports: true,
+    rebaseUrls: true,
+    includePaths: [],
+    commonBase: null
+  });
+
+  return through.obj(function(file, enc, cb) {
+    var processedCss;
+
+    if (file.isStream()) {
+      this.emit('error', new PluginError('gulp-concat-css', 'Streaming not supported'));
+      return cb();
+    }
+
+    if(!firstFile) {
+      firstFile = file;
+      commonBase = options.commonBase || file.base;
+    }
+
+    function urlPlugin(file) {
+      return reworkUrl(function(url) {
+        if(isUrl(url) || isDataURI(url) || path.extname(url) === '.css' || path.resolve(url) === url) {
+          return url;
+        }
+
+        var resourceAbsUrl = path.relative(commonBase, path.resolve(path.dirname(file), url));
+        resourceAbsUrl = path.relative(destDir, resourceAbsUrl);
+        //not all systems use forward slash as path separator
+        //this is required by urls.
+        if(path.sep === '\\'){
+          //replace with forward slash
+          resourceAbsUrl = resourceAbsUrl.replace(/\\/g, '/');
+        }
+        return resourceAbsUrl;
+      });
+    }
+
+
+    function collectImportUrls(styles) {
+      var outRules = [];
+      styles.rules.forEach(function(rule) {
+        if(rule.type !== 'import') {
+          return outRules.push(rule);
+        }
+
+        var importData = parseImport('@import ' + rule.import + ';');
+        var importPath = importData && importData[0].path;
+        if(isUrl(importPath) || !options.inlineImports) {
+          return urlImportRules.push(rule);
+        }
+        return outRules.push(rule);
+      });
+      styles.rules = outRules;
+    }
+
+
+    function processNestedImport(contents) {
+      var rew = rework(contents,{source:this.source});//find the css file has syntax errors
+      if(options.rebaseUrls) {
+        rew = rew.use(urlPlugin(this.source));
+      }
+      rew = rew.use(collectImportUrls);
+      return rew.toString();
+    }
+
+    try {
+      processedCss = rework(String(file.contents||""),{source:file.path});//find the css file has syntax errors
+      if(options.rebaseUrls) {
+        processedCss = processedCss.use(urlPlugin(file.path));
+      }
+
+      processedCss = processedCss.use(collectImportUrls);
+
+      if(options.inlineImports) {
+        processedCss = processedCss.use(reworkImport({
+          path: [
+            '.',
+            path.dirname(file.path)
+          ].concat(options.includePaths),
+          transform: processNestedImport
+        }))
+          .toString();
+      }
+
+      processedCss = processedCss.toString();
+    } catch(err) {
+      this.emit('error', new PluginError('gulp-concat-css', err));
+      return cb();
+    }
+
+    buffer.push(processedCss);
+    cb();
+  }, function(cb) {
+    if(!firstFile) {
+      return cb();
+    }
+
+    var contents = urlImportRules.map(function(rule) {
+      return '@import ' + rule.import + ';';
+    }).concat(buffer).join('\n');
+
+    var concatenatedFile = new Vinyl({
+      base: firstFile.base,
+      cwd: firstFile.cwd,
+      path: path.join(firstFile.base, destFile),
+      contents: new Buffer(contents)
+    });
+    this.push(concatenatedFile);
+    cb();
+  });
+};
+
+function isUrl(url) {
+  return (/^([\w]+:)?\/\/./).test(url);
+}
+
+function isDataURI(url) {
+  return url && url.indexOf('data:') === 0;
+}
--- a/node_modules/gulp-concat-css/node_modules/arr-diff/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/arr-diff/LICENSE
@ -0,0 +1,24 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2015 Jon Schlinkert.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/arr-diff/README.md
+++ b/node_modules/gulp-concat-css/node_modules/arr-diff/README.md
@ -0,0 +1,75 @@
+# arr-diff [![NPM version](https://badge.fury.io/js/arr-diff.svg)](http://badge.fury.io/js/arr-diff)  [![Build Status](https://travis-ci.org/jonschlinkert/arr-diff.svg)](https://travis-ci.org/jonschlinkert/arr-diff)
+
+> Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
+
+## Install
+
+Install with [npm](https://www.npmjs.com/)
+
+```sh
+$ npm i arr-diff --save
+```
+
+Install with [bower](http://bower.io/)
+
+```sh
+$ bower install arr-diff --save
+```
+
+## API
+
+### [diff](index.js#L33)
+
+Return the difference between the first array and additional arrays.
+
+**Params**
+
+* `a` **{Array}**
+* `b` **{Array}**
+* `returns` **{Array}**
+
+**Example**
+
+```js
+var diff = require('arr-diff');
+
+var a = ['a', 'b', 'c', 'd'];
+var b = ['b', 'c'];
+
+console.log(diff(a, b))
+//=> ['a', 'd']
+```
+
+## Related projects
+
+* [arr-flatten](https://www.npmjs.com/package/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten. | [homepage](https://github.com/jonschlinkert/arr-flatten)
+* [array-filter](https://www.npmjs.com/package/array-filter): Array#filter for older browsers. | [homepage](https://github.com/juliangruber/array-filter)
+* [array-intersection](https://www.npmjs.com/package/array-intersection): Return an array with the unique values present in _all_ given arrays using strict equality… [more](https://www.npmjs.com/package/array-intersection) | [homepage](https://github.com/jonschlinkert/array-intersection)
+
+## Running tests
+
+Install dev dependencies:
+
+```sh
+$ npm i -d && npm test
+```
+
+## Contributing
+
+Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/arr-diff/issues/new).
+
+## Author
+
+**Jon Schlinkert**
+
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
+
+## License
+
+Copyright © 2015 Jon Schlinkert
+Released under the MIT license.
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on August 23, 2015._
--- a/node_modules/gulp-concat-css/node_modules/arr-diff/index.js
+++ b/node_modules/gulp-concat-css/node_modules/arr-diff/index.js
@ -0,0 +1,58 @@
+/*!
+ * arr-diff <https://github.com/jonschlinkert/arr-diff>
+ *
+ * Copyright (c) 2014 Jon Schlinkert, contributors.
+ * Licensed under the MIT License
+ */
+
+'use strict';
+
+var flatten = require('arr-flatten');
+var slice = require('array-slice');
+
+/**
+ * Return the difference between the first array and
+ * additional arrays.
+ *
+ * ```js
+ * var diff = require('{%= name %}');
+ *
+ * var a = ['a', 'b', 'c', 'd'];
+ * var b = ['b', 'c'];
+ *
+ * console.log(diff(a, b))
+ * //=> ['a', 'd']
+ * ```
+ *
+ * @param  {Array} `a`
+ * @param  {Array} `b`
+ * @return {Array}
+ * @api public
+ */
+
+function diff(arr, arrays) {
+  var argsLen = arguments.length;
+  var len = arr.length, i = -1;
+  var res = [], arrays;
+
+  if (argsLen === 1) {
+    return arr;
+  }
+
+  if (argsLen > 2) {
+    arrays = flatten(slice(arguments, 1));
+  }
+
+  while (++i < len) {
+    if (!~arrays.indexOf(arr[i])) {
+      res.push(arr[i]);
+    }
+  }
+  return res;
+}
+
+/**
+ * Expose `diff`
+ */
+
+module.exports = diff;
--- a/node_modules/gulp-concat-css/node_modules/arr-diff/package.json
+++ b/node_modules/gulp-concat-css/node_modules/arr-diff/package.json
@ -0,0 +1,52 @@
+{
+  "name": "arr-diff",
+  "description": "Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.",
+  "version": "1.1.0",
+  "homepage": "https://github.com/jonschlinkert/arr-diff",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": "jonschlinkert/arr-diff",
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/arr-diff/issues"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "dependencies": {
+    "arr-flatten": "^1.0.1",
+    "array-slice": "^0.2.3"
+  },
+  "devDependencies": {
+    "array-differ": "^1.0.0",
+    "benchmarked": "^0.1.4",
+    "chalk": "^1.1.1",
+    "mocha": "^2.2.5",
+    "should": "^7.0.4"
+  },
+  "keywords": [
+    "arr",
+    "array",
+    "diff",
+    "differ",
+    "difference"
+  ],
+  "verb": {
+    "related": {
+      "list": [
+        "arr-flatten",
+        "array-filter",
+        "array-intersection"
+      ]
+    }
+  }
+}
--- a/node_modules/gulp-concat-css/node_modules/arr-union/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/arr-union/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2015, Jon Schlinkert.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/arr-union/README.md
+++ b/node_modules/gulp-concat-css/node_modules/arr-union/README.md
@ -0,0 +1,85 @@
+# arr-union [![NPM version](https://badge.fury.io/js/arr-union.svg)](http://badge.fury.io/js/arr-union)  [![Build Status](https://travis-ci.org/jonschlinkert/arr-union.svg)](https://travis-ci.org/jonschlinkert/arr-union)
+
+> Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.
+
+This library is **15-20 times faster** and more performant (scales better) than [array-union](https://github.com/sindresorhus/array-union), which just uses `[].concat.apply([], arguments)`.
+
+## Benchmarks
+
+See the [benchmarks](./benchmark).
+
+```bash
+#1: five-arrays.js
+  array-union.js x 245,487 ops/sec ±0.99% (96 runs sampled)
+  current.js x 5,267,661 ops/sec ±0.63% (98 runs sampled)
+
+#2: ten-arrays.js
+  array-union.js x 134,784 ops/sec ±0.51% (94 runs sampled)
+  current.js x 1,919,143 ops/sec ±0.45% (100 runs sampled)
+
+#3: two-arrays.js
+  array-union.js x 308,374 ops/sec ±0.75% (96 runs sampled)
+  current.js x 7,361,915 ops/sec ±0.67% (95 runs sampled)
+```
+
+## Install
+
+Install with [npm](https://www.npmjs.com/)
+
+```sh
+$ npm i arr-union --save
+```
+
+## Usage
+
+```js
+var union = require('arr-union');
+
+union(['a'], ['b', 'c'], ['d', 'e', 'f']);
+//=> ['a', 'b', 'c', 'd', 'e', 'f']
+```
+
+Returns only unique elements:
+
+```js
+union(['a', 'a'], ['b', 'c']);
+//=> ['a', 'b', 'c']
+```
+
+## Other array utilities
+
+* [arr-diff](https://github.com/jonschlinkert/arr-diff): Returns an array with only the unique values from the first array, by excluding all… [more](https://github.com/jonschlinkert/arr-diff)
+* [arr-flatten](https://github.com/jonschlinkert/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten.
+* [arr-filter](https://github.com/jonschlinkert/arr-filter): Faster alternative to javascript's native filter method.
+* [arr-map](https://github.com/jonschlinkert/arr-map): Faster, node.js focused alternative to JavaScript's native array map.
+* [arr-pluck](https://github.com/jonschlinkert/arr-pluck): Retrieves the value of a specified property from all elements in the collection.
+* [arr-reduce](https://github.com/jonschlinkert/arr-reduce): Fast array reduce that also loops over sparse elements.
+* [array-unique](https://github.com/jonschlinkert/array-unique): Return an array free of duplicate values. Fastest ES5 implementation.
+
+## Running tests
+
+Install dev dependencies:
+
+```sh
+$ npm i -d && npm test
+```
+
+## Contributing
+
+Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/arr-union/issues/new)
+
+## Author
+
+**Jon Schlinkert**
+
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
+
+## License
+
+Copyright © 2015 Jon Schlinkert
+Released under the MIT license.
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on June 15, 2015._
--- a/node_modules/gulp-concat-css/node_modules/arr-union/index.js
+++ b/node_modules/gulp-concat-css/node_modules/arr-union/index.js
@ -0,0 +1,30 @@
+/*!
+ * arr-union <https://github.com/jonschlinkert/arr-union>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function union(arr) {
+  var len = arguments.length;
+  var res = [], i = 0;
+
+  while (len--) {
+    var arg = arrayify(arguments[i++]);
+
+    for (var j = 0; j < arg.length; j++) {
+      var ele = arg[j];
+
+      if (res.indexOf(ele) === -1) {
+        res.push(ele);
+      }
+    }
+  }
+  return res;
+};
+
+function arrayify(val) {
+  return Array.isArray(val) ? val : [val];
+}
--- a/node_modules/gulp-concat-css/node_modules/arr-union/package.json
+++ b/node_modules/gulp-concat-css/node_modules/arr-union/package.json
@ -0,0 +1,53 @@
+{
+  "name": "arr-union",
+  "description": "Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.",
+  "version": "2.1.0",
+  "homepage": "https://github.com/jonschlinkert/arr-union",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/arr-union.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/arr-union/issues"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "devDependencies": {
+    "array-union": "^1.0.1",
+    "array-unique": "^0.2.1",
+    "benchmarked": "^0.1.3",
+    "chalk": "^1.0.0",
+    "minimist": "^1.1.1",
+    "mocha": "^2.2.1",
+    "should": "^5.2.0",
+    "verb": "^0.8.6"
+  },
+  "keywords": [
+    "add",
+    "append",
+    "array",
+    "arrays",
+    "combine",
+    "concat",
+    "extend",
+    "union",
+    "uniq",
+    "unique",
+    "util",
+    "utility",
+    "utils"
+  ]
+}
--- a/node_modules/gulp-concat-css/node_modules/array-slice/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/array-slice/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2015, Jon Schlinkert.Copyright (c) 2012-2015, The Dojo Foundation.copyright (c) 2009-2015, Jeremy Ashkenas.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/array-slice/README.md
+++ b/node_modules/gulp-concat-css/node_modules/array-slice/README.md
@ -0,0 +1,54 @@
+# array-slice [![NPM version](https://badge.fury.io/js/array-slice.svg)](http://badge.fury.io/js/array-slice)  [![Build Status](https://travis-ci.org/jonschlinkert/array-slice.svg)](https://travis-ci.org/jonschlinkert/array-slice) 
+
+> Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.
+
+This function is used instead of `Array#slice` to support node lists in IE < 9 and to ensure dense arrays are returned.
+
+## Install with [npm](npmjs.org)
+
+```bash
+npm i array-slice --save
+```
+
+## Usage
+
+```js
+var slice = require('array-slice');
+var arr = ['a', 'b', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
+
+slice(arr, 3, 6);
+//=> ['e', 'f', 'g']
+```
+
+## Useful array utils
+ * [arr-diff](https://github.com/jonschlinkert/arr-diff): Returns an array with only the unique values from the first array, by excluding all values from additional arrays using strict equality for comparisons.
+ * [arr-filter](https://github.com/jonschlinkert/arr-filter): Faster alternative to javascript's native filter method.
+ * [arr-flatten](https://github.com/jonschlinkert/arr-flatten): Recursively flatten an array or arrays. This is the fastest implementation of array flatten.
+ * [arr-union](https://github.com/jonschlinkert/arr-union): Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.
+ * [array-unique](https://github.com/jonschlinkert/array-unique): Return an array free of duplicate values. Fastest ES5 implementation.
+ * [array-intersection](https://github.com/jonschlinkert/array-intersection): Return an array with the unique values present in _all_ given arrays using strict equality for comparisons.
+
+## Running tests
+Install dev dependencies:
+
+```bash
+npm i -d && npm test
+```
+
+## Contributing
+Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/array-slice/issues)
+
+## Author
+
+**Jon Schlinkert**
+
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert) 
+
+## License
+Copyright (c) 2015 Jon Schlinkert  
+Released under the MIT license
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on April 07, 2015._
--- a/node_modules/gulp-concat-css/node_modules/array-slice/index.js
+++ b/node_modules/gulp-concat-css/node_modules/array-slice/index.js
@ -0,0 +1,36 @@
+/*!
+ * array-slice <https://github.com/jonschlinkert/array-slice>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+module.exports = function slice(arr, start, end) {
+  var len = arr.length >>> 0;
+  var range = [];
+
+  start = idx(arr, start);
+  end = idx(arr, end, len);
+
+  while (start < end) {
+    range.push(arr[start++]);
+  }
+  return range;
+};
+
+
+function idx(arr, pos, end) {
+  var len = arr.length >>> 0;
+
+  if (pos == null) {
+    pos = end || 0;
+  } else if (pos < 0) {
+    pos = Math.max(len + pos, 0);
+  } else {
+    pos = Math.min(pos, len);
+  }
+
+  return pos;
+}
--- a/node_modules/gulp-concat-css/node_modules/array-slice/package.json
+++ b/node_modules/gulp-concat-css/node_modules/array-slice/package.json
@ -0,0 +1,43 @@
+{
+  "name": "array-slice",
+  "description": "Array-slice method. Slices `array` from the `start` index up to, but not including, the `end` index.",
+  "version": "0.2.3",
+  "homepage": "https://github.com/jonschlinkert/array-slice",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/array-slice.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/array-slice/issues"
+  },
+  "license": {
+    "type": "MIT",
+    "url": "https://github.com/jonschlinkert/array-slice/blob/master/LICENSE"
+  },
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "devDependencies": {
+    "mocha": "*",
+    "should": "^5.2.0"
+  },
+  "keywords": [
+    "array",
+    "javascript",
+    "js",
+    "slice",
+    "util",
+    "utils"
+  ]
+}
--- a/node_modules/gulp-concat-css/node_modules/extend-shallow/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/extend-shallow/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2015, Jon Schlinkert.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/extend-shallow/README.md
+++ b/node_modules/gulp-concat-css/node_modules/extend-shallow/README.md
@ -0,0 +1,59 @@
+# extend-shallow [![NPM version](https://badge.fury.io/js/extend-shallow.svg)](http://badge.fury.io/js/extend-shallow)  [![Build Status](https://travis-ci.org/jonschlinkert/extend-shallow.svg)](https://travis-ci.org/jonschlinkert/extend-shallow)
+
+> Extend an object with the properties of additional objects. node.js/javascript util.
+
+Install with [npm](https://www.npmjs.com/)
+
+```sh
+$ npm i extend-shallow --save
+```
+
+## Running tests
+
+Install dev dependencies:
+
+```sh
+$ npm i -d && npm test
+```
+
+## Usage
+
+```js
+var extend = require('extend-shallow');
+
+extend({a: 'b'}, {c: 'd'})
+//=> {a: 'b', c: 'd'}
+```
+
+Pass an empty object to shallow clone:
+
+```js
+var obj = {};
+extend(obj, {a: 'b'}, {c: 'd'})
+//=> {a: 'b', c: 'd'}
+```
+
+## Related
+
+* [extend-shallow](https://github.com/jonschlinkert/extend-shallow): Extend an object with the properties of additional objects. node.js/javascript util.
+* [for-own](https://github.com/jonschlinkert/for-own): Iterate over the own enumerable properties of an object, and return an object with properties… [more](https://github.com/jonschlinkert/for-own)
+* [for-in](https://github.com/jonschlinkert/for-in): Iterate over the own and inherited enumerable properties of an objecte, and return an object… [more](https://github.com/jonschlinkert/for-in)
+* [is-plain-object](https://github.com/jonschlinkert/is-plain-object): Returns true if an object was created by the `Object` constructor.
+* [isobject](https://github.com/jonschlinkert/isobject): Returns true if the value is an object and not an array or null.
+* [kind-of](https://github.com/jonschlinkert/kind-of): Get the native type of a value.
+
+## Author
+
+**Jon Schlinkert**
+
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
+
+## License
+
+Copyright © 2015 Jon Schlinkert
+Released under the MIT license.
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on May 21, 2015._
--- a/node_modules/gulp-concat-css/node_modules/extend-shallow/index.js
+++ b/node_modules/gulp-concat-css/node_modules/extend-shallow/index.js
@ -0,0 +1,36 @@
+'use strict';
+
+var typeOf = require('kind-of');
+
+/**
+ * Expose `extend`
+ */
+
+module.exports = extend;
+
+/**
+ * Extend `o` with properties of other `objects`.
+ *
+ * @param  {Object} `o` The target object. Pass an empty object to shallow clone.
+ * @param  {Object} `objects`
+ * @return {Object}
+ */
+
+function extend(o) {
+  if (typeOf(o) !== 'object') { return {}; }
+  var args = arguments;
+  var len = args.length - 1;
+
+  for (var i = 0; i < len; i++) {
+    var obj = args[i + 1];
+
+    if (typeOf(obj) === 'object' && typeOf(obj) !== 'regexp') {
+      for (var key in obj) {
+        if (obj.hasOwnProperty(key)) {
+          o[key] = obj[key];
+        }
+      }
+    }
+  }
+  return o;
+};
--- a/node_modules/gulp-concat-css/node_modules/extend-shallow/package.json
+++ b/node_modules/gulp-concat-css/node_modules/extend-shallow/package.json
@ -0,0 +1,60 @@
+{
+  "name": "extend-shallow",
+  "description": "Extend an object with the properties of additional objects. node.js/javascript util.",
+  "version": "1.1.4",
+  "homepage": "https://github.com/jonschlinkert/extend-shallow",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/extend-shallow.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/extend-shallow/issues"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "dependencies": {
+    "kind-of": "^1.1.0"
+  },
+  "devDependencies": {
+    "array-slice": "^0.2.2",
+    "benchmarked": "^0.1.3",
+    "chalk": "^0.5.1",
+    "for-own": "^0.1.2",
+    "glob": "^4.3.1",
+    "is-plain-object": "^2.0.0",
+    "minimist": "^1.1.0",
+    "mocha": "*",
+    "should": "^5.0.1"
+  },
+  "keywords": [
+    "extend",
+    "javascript",
+    "js",
+    "keys",
+    "merge",
+    "obj",
+    "object",
+    "prop",
+    "properties",
+    "property",
+    "props",
+    "shallow",
+    "util",
+    "utility",
+    "utils",
+    "value"
+  ]
+}
--- a/node_modules/gulp-concat-css/node_modules/isarray/README.md
+++ b/node_modules/gulp-concat-css/node_modules/isarray/README.md
@ -0,0 +1,54 @@
+
+# isarray
+
+`Array#isArray` for older browsers.
+
+## Usage
+
+```js
+var isArray = require('isarray');
+
+console.log(isArray([])); // => true
+console.log(isArray({})); // => false
+```
+
+## Installation
+
+With [npm](http://npmjs.org) do
+
+```bash
+$ npm install isarray
+```
+
+Then bundle for the browser with
+[browserify](https://github.com/substack/browserify).
+
+With [component](http://component.io) do
+
+```bash
+$ component install juliangruber/isarray
+```
+
+## License
+
+(MIT)
+
+Copyright (c) 2013 Julian Gruber &lt;julian@juliangruber.com&gt;
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/isarray/build/build.js
+++ b/node_modules/gulp-concat-css/node_modules/isarray/build/build.js
@ -0,0 +1,209 @@
+
+/**
+ * Require the given path.
+ *
+ * @param {String} path
+ * @return {Object} exports
+ * @api public
+ */
+
+function require(path, parent, orig) {
+  var resolved = require.resolve(path);
+
+  // lookup failed
+  if (null == resolved) {
+    orig = orig || path;
+    parent = parent || 'root';
+    var err = new Error('Failed to require "' + orig + '" from "' + parent + '"');
+    err.path = orig;
+    err.parent = parent;
+    err.require = true;
+    throw err;
+  }
+
+  var module = require.modules[resolved];
+
+  // perform real require()
+  // by invoking the module's
+  // registered function
+  if (!module.exports) {
+    module.exports = {};
+    module.client = module.component = true;
+    module.call(this, module.exports, require.relative(resolved), module);
+  }
+
+  return module.exports;
+}
+
+/**
+ * Registered modules.
+ */
+
+require.modules = {};
+
+/**
+ * Registered aliases.
+ */
+
+require.aliases = {};
+
+/**
+ * Resolve `path`.
+ *
+ * Lookup:
+ *
+ *   - PATH/index.js
+ *   - PATH.js
+ *   - PATH
+ *
+ * @param {String} path
+ * @return {String} path or null
+ * @api private
+ */
+
+require.resolve = function(path) {
+  if (path.charAt(0) === '/') path = path.slice(1);
+  var index = path + '/index.js';
+
+  var paths = [
+    path,
+    path + '.js',
+    path + '.json',
+    path + '/index.js',
+    path + '/index.json'
+  ];
+
+  for (var i = 0; i < paths.length; i++) {
+    var path = paths[i];
+    if (require.modules.hasOwnProperty(path)) return path;
+  }
+
+  if (require.aliases.hasOwnProperty(index)) {
+    return require.aliases[index];
+  }
+};
+
+/**
+ * Normalize `path` relative to the current path.
+ *
+ * @param {String} curr
+ * @param {String} path
+ * @return {String}
+ * @api private
+ */
+
+require.normalize = function(curr, path) {
+  var segs = [];
+
+  if ('.' != path.charAt(0)) return path;
+
+  curr = curr.split('/');
+  path = path.split('/');
+
+  for (var i = 0; i < path.length; ++i) {
+    if ('..' == path[i]) {
+      curr.pop();
+    } else if ('.' != path[i] && '' != path[i]) {
+      segs.push(path[i]);
+    }
+  }
+
+  return curr.concat(segs).join('/');
+};
+
+/**
+ * Register module at `path` with callback `definition`.
+ *
+ * @param {String} path
+ * @param {Function} definition
+ * @api private
+ */
+
+require.register = function(path, definition) {
+  require.modules[path] = definition;
+};
+
+/**
+ * Alias a module definition.
+ *
+ * @param {String} from
+ * @param {String} to
+ * @api private
+ */
+
+require.alias = function(from, to) {
+  if (!require.modules.hasOwnProperty(from)) {
+    throw new Error('Failed to alias "' + from + '", it does not exist');
+  }
+  require.aliases[to] = from;
+};
+
+/**
+ * Return a require function relative to the `parent` path.
+ *
+ * @param {String} parent
+ * @return {Function}
+ * @api private
+ */
+
+require.relative = function(parent) {
+  var p = require.normalize(parent, '..');
+
+  /**
+   * lastIndexOf helper.
+   */
+
+  function lastIndexOf(arr, obj) {
+    var i = arr.length;
+    while (i--) {
+      if (arr[i] === obj) return i;
+    }
+    return -1;
+  }
+
+  /**
+   * The relative require() itself.
+   */
+
+  function localRequire(path) {
+    var resolved = localRequire.resolve(path);
+    return require(resolved, parent, path);
+  }
+
+  /**
+   * Resolve relative to the parent.
+   */
+
+  localRequire.resolve = function(path) {
+    var c = path.charAt(0);
+    if ('/' == c) return path.slice(1);
+    if ('.' == c) return require.normalize(p, path);
+
+    // resolve deps by returning
+    // the dep in the nearest "deps"
+    // directory
+    var segs = parent.split('/');
+    var i = lastIndexOf(segs, 'deps') + 1;
+    if (!i) i = 0;
+    path = segs.slice(0, i + 1).join('/') + '/deps/' + path;
+    return path;
+  };
+
+  /**
+   * Check if module is defined at `path`.
+   */
+
+  localRequire.exists = function(path) {
+    return require.modules.hasOwnProperty(localRequire.resolve(path));
+  };
+
+  return localRequire;
+};
+require.register("isarray/index.js", function(exports, require, module){
+module.exports = Array.isArray || function (arr) {
+  return Object.prototype.toString.call(arr) == '[object Array]';
+};
+
+});
+require.alias("isarray/index.js", "isarray/index.js");
+
--- a/node_modules/gulp-concat-css/node_modules/isarray/component.json
+++ b/node_modules/gulp-concat-css/node_modules/isarray/component.json
@ -0,0 +1,19 @@
+{
+  "name" : "isarray",
+  "description" : "Array#isArray for older browsers",
+  "version" : "0.0.1",
+  "repository" : "juliangruber/isarray",
+  "homepage": "https://github.com/juliangruber/isarray",
+  "main" : "index.js",
+  "scripts" : [
+    "index.js"
+  ],
+  "dependencies" : {},
+  "keywords": ["browser","isarray","array"],
+  "author": {
+    "name": "Julian Gruber",
+    "email": "mail@juliangruber.com",
+    "url": "http://juliangruber.com"
+  },
+  "license": "MIT"
+}
--- a/node_modules/gulp-concat-css/node_modules/isarray/index.js
+++ b/node_modules/gulp-concat-css/node_modules/isarray/index.js
@ -0,0 +1,3 @@
+module.exports = Array.isArray || function (arr) {
+  return Object.prototype.toString.call(arr) == '[object Array]';
+};
--- a/node_modules/gulp-concat-css/node_modules/isarray/package.json
+++ b/node_modules/gulp-concat-css/node_modules/isarray/package.json
@ -0,0 +1,25 @@
+{
+  "name" : "isarray",
+  "description" : "Array#isArray for older browsers",
+  "version" : "0.0.1",
+  "repository" : {
+    "type" : "git",
+    "url" : "git://github.com/juliangruber/isarray.git"
+  },
+  "homepage": "https://github.com/juliangruber/isarray",
+  "main" : "index.js",
+  "scripts" : {
+    "test" : "tap test/*.js"
+  },
+  "dependencies" : {},
+  "devDependencies" : {
+    "tap" : "*"
+  },
+  "keywords": ["browser","isarray","array"],
+  "author": {
+    "name": "Julian Gruber",
+    "email": "mail@juliangruber.com",
+    "url": "http://juliangruber.com"
+  },
+  "license": "MIT"
+}
--- a/node_modules/gulp-concat-css/node_modules/kind-of/README.md
+++ b/node_modules/gulp-concat-css/node_modules/kind-of/README.md
@ -0,0 +1,155 @@
+# kind-of [![NPM version](https://badge.fury.io/js/kind-of.svg)](http://badge.fury.io/js/kind-of)  [![Build Status](https://travis-ci.org/jonschlinkert/kind-of.svg)](https://travis-ci.org/jonschlinkert/kind-of) 
+
+> Get the native type of a value.
+
+## Install with [npm](npmjs.org)
+
+```bash
+npm i kind-of --save
+```
+
+## Usage
+
+```js
+var kindOf = require('kind-of');
+
+kindOf(undefined);
+//=> 'undefined'
+
+kindOf(null);
+//=> 'null'
+
+kindOf(true);
+//=> 'boolean'
+
+kindOf(false);
+//=> 'boolean'
+
+kindOf(new Boolean(true));
+//=> 'boolean'
+
+kindOf(new Buffer(''));
+//=> 'buffer'
+
+kindOf(42);
+//=> 'number'
+
+kindOf(new Number(42));
+//=> 'number'
+
+kindOf("string");
+//=> 'string'
+
+kindOf(arguments);
+//=> 'arguments'
+
+kindOf({});
+//=> 'object'
+
+kindOf(new Test());
+//=> 'object'
+
+kindOf(new Date());
+//=> 'date'
+
+kindOf([]);
+//=> 'array'
+
+kindOf([1, 2, 3]);
+//=> 'array'
+
+kindOf(new Array());
+//=> 'array'
+
+kindOf(/[\s\S]+/);
+//=> 'regexp'
+
+kindOf(new RegExp('^' + 'foo$'));
+//=> 'regexp'
+
+kindOf(function () {});
+//=> 'function'
+
+kindOf(new Function());
+//=> 'function'
+```
+
+
+## Run tests
+
+Install dev dependencies:
+
+```bash
+npm i -d && npm test
+```
+
+## Benchmarks
+
+Benchmarked against [typeof](http://github.com/CodingFu/typeof) and [type-of](https://github.com/ForbesLindesay/type-of).
+
+```bash
+#1: array.js
+  kind-of x 21,578,944 ops/sec ±1.01% (97 runs sampled)
+  (lib) type-of x 4,593,840 ops/sec ±0.76% (92 runs sampled)
+  (lib) typeof x 5,786,776 ops/sec ±0.71% (97 runs sampled)
+
+#2: boolean.js
+  kind-of x 25,189,600 ops/sec ±0.60% (97 runs sampled)
+  (lib) type-of x 2,751,076 ops/sec ±0.78% (100 runs sampled)
+  (lib) typeof x 4,390,312 ops/sec ±0.61% (99 runs sampled)
+
+#3: date.js
+  kind-of x 8,862,303 ops/sec ±0.77% (99 runs sampled)
+  (lib) type-of x 6,239,662 ops/sec ±0.67% (94 runs sampled)
+  (lib) typeof x 6,180,922 ops/sec ±0.59% (97 runs sampled)
+
+#4: function.js
+  kind-of x 19,685,336 ops/sec ±1.67% (95 runs sampled)
+  (lib) type-of x 6,648,551 ops/sec ±0.93% (95 runs sampled)
+  (lib) typeof x 6,631,967 ops/sec ±1.05% (92 runs sampled)
+
+#5: null.js
+  kind-of x 24,155,010 ops/sec ±0.95% (91 runs sampled)
+  (lib) type-of x 12,854,583 ops/sec ±0.69% (94 runs sampled)
+  (lib) typeof x 8,182,952 ops/sec ±0.48% (99 runs sampled)
+
+#6: number.js
+  kind-of x 20,993,521 ops/sec ±0.37% (98 runs sampled)
+  (lib) type-of x 2,112,716 ops/sec ±0.73% (96 runs sampled)
+  (lib) typeof x 4,492,943 ops/sec ±0.68% (96 runs sampled)
+
+#7: object.js
+  kind-of x 3,686,169 ops/sec ±0.85% (96 runs sampled)
+  (lib) type-of x 3,661,833 ops/sec ±0.73% (98 runs sampled)
+  (lib) typeof x 6,159,847 ops/sec ±0.72% (98 runs sampled)
+
+#8: regex.js
+  kind-of x 10,780,535 ops/sec ±0.75% (95 runs sampled)
+  (lib) type-of x 5,380,781 ops/sec ±0.83% (92 runs sampled)
+  (lib) typeof x 5,852,558 ops/sec ±0.67% (95 runs sampled)
+
+#9: string.js
+  kind-of x 19,713,570 ops/sec ±0.69% (91 runs sampled)
+  (lib) type-of x 4,017,753 ops/sec ±0.85% (98 runs sampled)
+  (lib) typeof x 4,370,984 ops/sec ±0.62% (100 runs sampled)
+
+#10: undef.js
+  kind-of x 23,250,387 ops/sec ±0.88% (91 runs sampled)
+  (lib) type-of x 13,725,183 ops/sec ±0.62% (91 runs sampled)
+  (lib) typeof x 20,549,334 ops/sec ±0.74% (97 runs sampled)
+```
+
+## Author
+
+**Jon Schlinkert**
+ 
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert) 
+
+## License
+Copyright (c) 2014-2015 Jon Schlinkert  
+Released under the MIT license
+
+***
+
+_This file was generated by [verb](https://github.com/assemble/verb) on February 09, 2015._
--- a/node_modules/gulp-concat-css/node_modules/kind-of/index.js
+++ b/node_modules/gulp-concat-css/node_modules/kind-of/index.js
@ -0,0 +1,45 @@
+var toString = Object.prototype.toString;
+
+/**
+ * Get the native `typeof` a value.
+ *
+ * @param  {*} `val`
+ * @return {*} Native javascript type
+ */
+
+module.exports = function kindOf(val) {
+  if (val === undefined) {
+    return 'undefined';
+  }
+  if (val === null) {
+    return 'null';
+  }
+  if (val === true || val === false || val instanceof Boolean) {
+    return 'boolean';
+  }
+  if (typeof val !== 'object') {
+    return typeof val;
+  }
+  if (Array.isArray(val)) {
+    return 'array';
+  }
+
+  var type = toString.call(val);
+
+  if (val instanceof RegExp || type === '[object RegExp]') {
+    return 'regexp';
+  }
+  if (val instanceof Date || type === '[object Date]') {
+    return 'date';
+  }
+  if (type === '[object Function]') {
+    return 'function';
+  }
+  if (type === '[object Arguments]') {
+    return 'arguments';
+  }
+  if (typeof Buffer !== 'undefined' && Buffer.isBuffer(val)) {
+    return 'buffer';
+  }
+  return type.slice(8, -1).toLowerCase();
+};
--- a/node_modules/gulp-concat-css/node_modules/kind-of/package.json
+++ b/node_modules/gulp-concat-css/node_modules/kind-of/package.json
@ -0,0 +1,59 @@
+{
+  "name": "kind-of",
+  "description": "Get the native type of a value.",
+  "version": "1.1.0",
+  "homepage": "https://github.com/jonschlinkert/kind-of",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/kind-of.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/kind-of/issues"
+  },
+  "license": {
+    "type": "MIT",
+    "url": "https://github.com/jonschlinkert/kind-of/blob/master/LICENSE"
+  },
+  "files": ["index.js"],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "devDependencies": {
+    "benchmarked": "^0.1.3",
+    "chalk": "^0.5.1",
+    "glob": "^4.3.5",
+    "should": "^4.6.1",
+    "type-of": "^2.0.1",
+    "typeof": "^1.0.0"
+  },
+  "keywords": [
+    "arguments",
+    "array",
+    "boolean",
+    "check",
+    "date",
+    "function",
+    "is",
+    "is-type",
+    "is-type-of",
+    "kind",
+    "kind-of",
+    "number",
+    "object",
+    "regexp",
+    "string",
+    "test",
+    "type",
+    "type-of",
+    "typeof",
+    "types"
+  ]
+}
--- a/node_modules/gulp-concat-css/node_modules/plugin-error/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/plugin-error/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015, Jon Schlinkert.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/plugin-error/README.md
+++ b/node_modules/gulp-concat-css/node_modules/plugin-error/README.md
@ -0,0 +1,88 @@
+# plugin-error [![NPM version](https://badge.fury.io/js/plugin-error.svg)](http://badge.fury.io/js/plugin-error)  [![Build Status](https://travis-ci.org/jonschlinkert/plugin-error.svg)](https://travis-ci.org/jonschlinkert/plugin-error)
+
+> Error handling for vinyl plugins. Just an abstraction of what's in gulp-util with minor changes.
+
+Install with [npm](https://www.npmjs.com/)
+
+```sh
+$ npm i plugin-error --save
+```
+
+## Usage
+
+```js
+var PluginError = require('plugin-error');
+```
+
+### new PluginError(pluginName, message[, options]);
+
+**Params**
+
+* `pluginName` should be the module name of your plugin
+* `message` **{String|Object}**: may be a string or an existing error object
+* `options` **{Object}**
+
+**Behavior:**
+
+* By default the stack will not be shown. Set `options.showStack` to true if you think the stack is important for your error.
+* If you pass an error object as the message the stack will be pulled from that, otherwise one will be created.
+* If you pass in a custom stack string you need to include the message along with that.
+* Error properties will be included in `err.toString()`, but may be omitted by including `{showProperties: false}` in the options.
+
+**Examples**
+
+All of the following are acceptable forms of instantiation:
+
+```javascript
+var err = new PluginError('test', {
+  message: 'something broke'
+});
+
+var err = new PluginError({
+  plugin: 'test',
+  message: 'something broke'
+});
+
+var err = new PluginError('test', 'something broke');
+
+var err = new PluginError('test', 'something broke', {showStack: true});
+
+var existingError = new Error('OMG');
+var err = new PluginError('test', existingError, {showStack: true});
+```
+
+## Related projects
+
+* [assemble](http://assemble.io): Static site generator for Grunt.js, Yeoman and Node.js. Used by Zurb Foundation, Zurb Ink, H5BP/Effeckt,… [more](http://assemble.io)
+* [gulp-util](https://github.com/wearefractal/gulp-util#readme): Utility functions for gulp plugins
+* [gulp](http://gulpjs.com): The streaming build system
+* [generate](https://github.com/generate/generate): Project generator, for node.js.
+* [verb](https://github.com/assemble/verb): Documentation generator for GitHub projects. Extremely powerful, easy to use, can generate anything from API… [more](https://github.com/assemble/verb)
+
+## Running tests
+
+Install dev dependencies:
+
+```sh
+$ npm i -d && npm test
+```
+
+## Contributing
+
+Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/plugin-error/issues/new)
+
+## Author
+
+**Jon Schlinkert**
+
+ [github/jonschlinkert](https://github.com/jonschlinkert)
+ [twitter/jonschlinkert](http://twitter.com/jonschlinkert)
+
+## License
+
+Copyright © 2015 Jon Schlinkert
+Released under the MIT license.
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on May 31, 2015._
--- a/node_modules/gulp-concat-css/node_modules/plugin-error/index.js
+++ b/node_modules/gulp-concat-css/node_modules/plugin-error/index.js
@ -0,0 +1,185 @@
+/*!
+ * plugin-error <https://github.com/jonschlinkert/plugin-error>
+ *
+ * Copyright (c) 2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+var util = require('util');
+var red = require('ansi-red');
+var cyan = require('ansi-cyan');
+var extend = require('extend-shallow');
+var differ = require('arr-diff');
+var union = require('arr-union');
+
+/**
+ * Based on gulp-util PluginError (MIT Licensed)
+ * See: https://github.com/wearefractal/gulp-util
+ */
+
+var nonEnum = ['message', 'name', 'stack'];
+var ignored = union(nonEnum, ['__safety', '_stack', 'plugin', 'showProperties', 'showStack']);
+var props = ['fileName', 'lineNumber', 'message', 'name', 'plugin', 'showProperties', 'showStack', 'stack'];
+
+function PluginError(plugin, message, options) {
+  if (!(this instanceof PluginError)) {
+    throw new Error('Call PluginError using new');
+  }
+
+  Error.call(this);
+  var opts = setDefaults(plugin, message, options);
+  var self = this;
+
+  // if opts has an error, get details from it
+  if (typeof opts.error === 'object') {
+    var keys = union(Object.keys(opts.error), nonEnum);
+
+    // These properties are not enumerable, so we have to add them explicitly.
+    keys.forEach(function(prop) {
+      self[prop] = opts.error[prop];
+    });
+  }
+
+  // opts object can override
+  props.forEach(function(prop) {
+    if (prop in opts) this[prop] = opts[prop];
+  }, this);
+
+  // defaults
+  if (!this.name) this.name = 'Error';
+  if (!this.stack) {
+
+    /**
+     * `Error.captureStackTrace` appends a stack property which
+     * relies on the toString method of the object it is applied to.
+     *
+     * Since we are using our own toString method which controls when
+     * to display the stack trace, if we don't go through this safety
+     * object we'll get stack overflow problems.
+     */
+
+    var safety = {};
+    safety.toString = function() {
+      return this._messageWithDetails() + '\nStack:';
+    }.bind(this);
+
+    Error.captureStackTrace(safety, arguments.callee || this.constructor);
+    this.__safety = safety;
+  }
+  if (!this.plugin) throw new Error('Missing plugin name');
+  if (!this.message) throw new Error('Missing error message');
+}
+
+util.inherits(PluginError, Error);
+
+/**
+ * Output a formatted message with details
+ */
+
+PluginError.prototype._messageWithDetails = function() {
+  var msg = 'Message:\n    ' + this.message;
+  var details = this._messageDetails();
+  if (details !== '') msg += '\n' + details;
+  return msg;
+};
+
+/**
+ * Output actual message details
+ */
+
+PluginError.prototype._messageDetails = function() {
+  if (!this.showProperties) return '';
+
+  var props = differ(Object.keys(this), ignored);
+  var len = props.length;
+
+  if (len === 0) return '';
+
+  var res = '', i = 0;
+  while (len--) {
+    var prop = props[i++];
+    res += '    ';
+    res += prop + ': ' + this[prop];
+    res += '\n';
+  }
+  return 'Details:\n' + res;
+};
+
+/**
+ * Override the `toString` method
+ */
+
+PluginError.prototype.toString = function () {
+  var detailsWithStack = function(stack) {
+    return this._messageWithDetails() + '\nStack:\n' + stack;
+  }.bind(this);
+
+  var msg = '';
+  if (this.showStack) {
+    // if there is no wrapped error, use the stack captured in the PluginError ctor
+    if (this.__safety) {
+      msg = this.__safety.stack;
+
+    } else if (this._stack) {
+      msg = detailsWithStack(this._stack);
+
+    } else {
+      // Stack from wrapped error
+      msg = detailsWithStack(this.stack);
+    }
+    return message(msg, this);
+    }
+
+  msg = this._messageWithDetails();
+  return message(msg, this);
+};
+
+// format the output message
+function message(msg, thisArg) {
+  var sig = red(thisArg.name);
+  sig += ' in plugin ';
+  sig += '"' + cyan(thisArg.plugin) + '"';
+  sig += '\n';
+  sig += msg;
+  return sig;
+}
+
+/**
+ * Set default options based on arguments.
+ */
+
+function setDefaults(plugin, message, opts) {
+  if (typeof plugin === 'object') {
+    return defaults(plugin);
+  }
+  opts = opts || {};
+  if (message instanceof Error) {
+    opts.error = message;
+  } else if (typeof message === 'object') {
+    opts = message;
+  } else {
+    opts.message = message;
+  }
+  opts.plugin = plugin;
+  return defaults(opts);
+}
+
+/**
+ * Extend default options with:
+ *
+ *  - `showStack`: default=false
+ *  - `showProperties`: default=true
+ *
+ * @param  {Object} `opts` Options to extend
+ * @return {Object}
+ */
+
+function defaults(opts) {
+  return extend({showStack: false, showProperties: true}, opts);
+}
+
+/**
+ * Expose `PluginError`
+ */
+
+module.exports = PluginError;
--- a/node_modules/gulp-concat-css/node_modules/plugin-error/package.json
+++ b/node_modules/gulp-concat-css/node_modules/plugin-error/package.json
@ -0,0 +1,43 @@
+{
+  "name": "plugin-error",
+  "description": "Error handling for vinyl plugins. Just an abstraction of what's in gulp-util with minor changes.",
+  "version": "0.1.2",
+  "homepage": "https://github.com/jonschlinkert/plugin-error",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/plugin-error.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/plugin-error/issues"
+  },
+  "license": "MIT",
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "dependencies": {
+    "ansi-cyan": "^0.1.1",
+    "ansi-red": "^0.1.1",
+    "arr-diff": "^1.0.1",
+    "arr-union": "^2.0.1",
+    "extend-shallow": "^1.1.2"
+  },
+  "devDependencies": {
+    "mocha": "*",
+    "should": "*"
+  },
+  "keywords": [
+    "error",
+    "plugin"
+  ]
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/.npmignore
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/.npmignore
@ -0,0 +1,5 @@
+build/
+test/
+examples/
+fs.js
+zlib.js
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/LICENSE
@ -0,0 +1,18 @@
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/README.md
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/README.md
@ -0,0 +1,15 @@
+# readable-stream
+
+***Node-core streams for userland***
+
+[![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)
+[![NPM](https://nodei.co/npm-dl/readable-stream.png&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+
+This package is a mirror of the Streams2 and Streams3 implementations in Node-core.
+
+If you want to guarantee a stable streams base, regardless of what version of Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core.
+
+**readable-stream** comes in two major versions, v1.0.x and v1.1.x. The former tracks the Streams2 implementation in Node 0.10, including bug-fixes and minor improvements as they are added. The latter tracks Streams3 as it develops in Node 0.11; we will likely see a v1.2.x branch for Node 0.12.
+
+**readable-stream** uses proper patch-level versioning so if you pin to `"~1.0.0"` you’ll get the latest Node 0.10 Streams2 implementation, including any fixes and minor non-breaking improvements. The patch-level versions of 1.0.x and 1.1.x should mirror the patch-level versions of Node-core releases. You should prefer the **1.0.x** releases for now and when you’re ready to start using Streams3, pin to `"~1.1.0"`
+
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/duplex.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/duplex.js
@ -0,0 +1 @@
+module.exports = require("./lib/_stream_duplex.js")
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/float.patch
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/float.patch
@ -0,0 +1,923 @@
+diff --git a/lib/_stream_duplex.js b/lib/_stream_duplex.js
+index c5a741c..a2e0d8e 100644
+--- a/lib/_stream_duplex.js
+++ b/lib/_stream_duplex.js
+@@ -26,8 +26,8 @@
+ 
+ module.exports = Duplex;
+ var util = require('util');
+-var Readable = require('_stream_readable');
+-var Writable = require('_stream_writable');
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+ 
+ util.inherits(Duplex, Readable);
+ 
+diff --git a/lib/_stream_passthrough.js b/lib/_stream_passthrough.js
+index a5e9864..330c247 100644
+--- a/lib/_stream_passthrough.js
+++ b/lib/_stream_passthrough.js
+@@ -25,7 +25,7 @@
+ 
+ module.exports = PassThrough;
+ 
+-var Transform = require('_stream_transform');
+var Transform = require('./_stream_transform');
+ var util = require('util');
+ util.inherits(PassThrough, Transform);
+ 
+diff --git a/lib/_stream_readable.js b/lib/_stream_readable.js
+index 0c3fe3e..90a8298 100644
+--- a/lib/_stream_readable.js
+++ b/lib/_stream_readable.js
+@@ -23,10 +23,34 @@ module.exports = Readable;
+ Readable.ReadableState = ReadableState;
+ 
+ var EE = require('events').EventEmitter;
+if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
+  return emitter.listeners(type).length;
+};
+
+if (!global.setImmediate) global.setImmediate = function setImmediate(fn) {
+  return setTimeout(fn, 0);
+};
+if (!global.clearImmediate) global.clearImmediate = function clearImmediate(i) {
+  return clearTimeout(i);
+};
+
+ var Stream = require('stream');
+ var util = require('util');
+if (!util.isUndefined) {
+  var utilIs = require('core-util-is');
+  for (var f in utilIs) {
+    util[f] = utilIs[f];
+  }
+}
+ var StringDecoder;
+-var debug = util.debuglog('stream');
+var debug;
+if (util.debuglog)
+  debug = util.debuglog('stream');
+else try {
+  debug = require('debuglog')('stream');
+} catch (er) {
+  debug = function() {};
+}
+ 
+ util.inherits(Readable, Stream);
+ 
+@@ -380,7 +404,7 @@ function chunkInvalid(state, chunk) {
+ 
+ 
+ function onEofChunk(stream, state) {
+-  if (state.decoder && !state.ended) {
+  if (state.decoder && !state.ended && state.decoder.end) {
+     var chunk = state.decoder.end();
+     if (chunk && chunk.length) {
+       state.buffer.push(chunk);
+diff --git a/lib/_stream_transform.js b/lib/_stream_transform.js
+index b1f9fcc..b0caf57 100644
+--- a/lib/_stream_transform.js
+++ b/lib/_stream_transform.js
+@@ -64,8 +64,14 @@
+ 
+ module.exports = Transform;
+ 
+-var Duplex = require('_stream_duplex');
+var Duplex = require('./_stream_duplex');
+ var util = require('util');
+if (!util.isUndefined) {
+  var utilIs = require('core-util-is');
+  for (var f in utilIs) {
+    util[f] = utilIs[f];
+  }
+}
+ util.inherits(Transform, Duplex);
+ 
+ 
+diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
+index ba2e920..f49288b 100644
+--- a/lib/_stream_writable.js
+++ b/lib/_stream_writable.js
+@@ -27,6 +27,12 @@ module.exports = Writable;
+ Writable.WritableState = WritableState;
+ 
+ var util = require('util');
+if (!util.isUndefined) {
+  var utilIs = require('core-util-is');
+  for (var f in utilIs) {
+    util[f] = utilIs[f];
+  }
+}
+ var Stream = require('stream');
+ 
+ util.inherits(Writable, Stream);
+@@ -119,7 +125,7 @@ function WritableState(options, stream) {
+ function Writable(options) {
+   // Writable ctor is applied to Duplexes, though they're not
+   // instanceof Writable, they're instanceof Readable.
+-  if (!(this instanceof Writable) && !(this instanceof Stream.Duplex))
+  if (!(this instanceof Writable) && !(this instanceof require('./_stream_duplex')))
+     return new Writable(options);
+ 
+   this._writableState = new WritableState(options, this);
+diff --git a/test/simple/test-stream-big-push.js b/test/simple/test-stream-big-push.js
+index e3787e4..8cd2127 100644
+--- a/test/simple/test-stream-big-push.js
+++ b/test/simple/test-stream-big-push.js
+@@ -21,7 +21,7 @@
+ 
+ var common = require('../common');
+ var assert = require('assert');
+-var stream = require('stream');
+var stream = require('../../');
+ var str = 'asdfasdfasdfasdfasdf';
+ 
+ var r = new stream.Readable({
+diff --git a/test/simple/test-stream-end-paused.js b/test/simple/test-stream-end-paused.js
+index bb73777..d40efc7 100644
+--- a/test/simple/test-stream-end-paused.js
+++ b/test/simple/test-stream-end-paused.js
+@@ -25,7 +25,7 @@ var gotEnd = false;
+ 
+ // Make sure we don't miss the end event for paused 0-length streams
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ var stream = new Readable();
+ var calledRead = false;
+ stream._read = function() {
+diff --git a/test/simple/test-stream-pipe-after-end.js b/test/simple/test-stream-pipe-after-end.js
+index b46ee90..0be8366 100644
+--- a/test/simple/test-stream-pipe-after-end.js
+++ b/test/simple/test-stream-pipe-after-end.js
+@@ -22,8 +22,8 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('_stream_readable');
+-var Writable = require('_stream_writable');
+var Readable = require('../../lib/_stream_readable');
+var Writable = require('../../lib/_stream_writable');
+ var util = require('util');
+ 
+ util.inherits(TestReadable, Readable);
+diff --git a/test/simple/test-stream-pipe-cleanup.js b/test/simple/test-stream-pipe-cleanup.js
+deleted file mode 100644
+index f689358..0000000
+--- a/test/simple/test-stream-pipe-cleanup.js
+++ /dev/null
+@@ -1,122 +0,0 @@
+-// Copyright Joyent, Inc. and other Node contributors.
+-//
+-// Permission is hereby granted, free of charge, to any person obtaining a
+-// copy of this software and associated documentation files (the
+-// "Software"), to deal in the Software without restriction, including
+-// without limitation the rights to use, copy, modify, merge, publish,
+-// distribute, sublicense, and/or sell copies of the Software, and to permit
+-// persons to whom the Software is furnished to do so, subject to the
+-// following conditions:
+-//
+-// The above copyright notice and this permission notice shall be included
+-// in all copies or substantial portions of the Software.
+-//
+-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+-
+-// This test asserts that Stream.prototype.pipe does not leave listeners
+-// hanging on the source or dest.
+-
+-var common = require('../common');
+-var stream = require('stream');
+-var assert = require('assert');
+-var util = require('util');
+-
+-function Writable() {
+-  this.writable = true;
+-  this.endCalls = 0;
+-  stream.Stream.call(this);
+-}
+-util.inherits(Writable, stream.Stream);
+-Writable.prototype.end = function() {
+-  this.endCalls++;
+-};
+-
+-Writable.prototype.destroy = function() {
+-  this.endCalls++;
+-};
+-
+-function Readable() {
+-  this.readable = true;
+-  stream.Stream.call(this);
+-}
+-util.inherits(Readable, stream.Stream);
+-
+-function Duplex() {
+-  this.readable = true;
+-  Writable.call(this);
+-}
+-util.inherits(Duplex, Writable);
+-
+-var i = 0;
+-var limit = 100;
+-
+-var w = new Writable();
+-
+-var r;
+-
+-for (i = 0; i < limit; i++) {
+-  r = new Readable();
+-  r.pipe(w);
+-  r.emit('end');
+-}
+-assert.equal(0, r.listeners('end').length);
+-assert.equal(limit, w.endCalls);
+-
+-w.endCalls = 0;
+-
+-for (i = 0; i < limit; i++) {
+-  r = new Readable();
+-  r.pipe(w);
+-  r.emit('close');
+-}
+-assert.equal(0, r.listeners('close').length);
+-assert.equal(limit, w.endCalls);
+-
+-w.endCalls = 0;
+-
+-r = new Readable();
+-
+-for (i = 0; i < limit; i++) {
+-  w = new Writable();
+-  r.pipe(w);
+-  w.emit('close');
+-}
+-assert.equal(0, w.listeners('close').length);
+-
+-r = new Readable();
+-w = new Writable();
+-var d = new Duplex();
+-r.pipe(d); // pipeline A
+-d.pipe(w); // pipeline B
+-assert.equal(r.listeners('end').length, 2);   // A.onend, A.cleanup
+-assert.equal(r.listeners('close').length, 2); // A.onclose, A.cleanup
+-assert.equal(d.listeners('end').length, 2);   // B.onend, B.cleanup
+-assert.equal(d.listeners('close').length, 3); // A.cleanup, B.onclose, B.cleanup
+-assert.equal(w.listeners('end').length, 0);
+-assert.equal(w.listeners('close').length, 1); // B.cleanup
+-
+-r.emit('end');
+-assert.equal(d.endCalls, 1);
+-assert.equal(w.endCalls, 0);
+-assert.equal(r.listeners('end').length, 0);
+-assert.equal(r.listeners('close').length, 0);
+-assert.equal(d.listeners('end').length, 2);   // B.onend, B.cleanup
+-assert.equal(d.listeners('close').length, 2); // B.onclose, B.cleanup
+-assert.equal(w.listeners('end').length, 0);
+-assert.equal(w.listeners('close').length, 1); // B.cleanup
+-
+-d.emit('end');
+-assert.equal(d.endCalls, 1);
+-assert.equal(w.endCalls, 1);
+-assert.equal(r.listeners('end').length, 0);
+-assert.equal(r.listeners('close').length, 0);
+-assert.equal(d.listeners('end').length, 0);
+-assert.equal(d.listeners('close').length, 0);
+-assert.equal(w.listeners('end').length, 0);
+-assert.equal(w.listeners('close').length, 0);
+diff --git a/test/simple/test-stream-pipe-error-handling.js b/test/simple/test-stream-pipe-error-handling.js
+index c5d724b..c7d6b7d 100644
+--- a/test/simple/test-stream-pipe-error-handling.js
+++ b/test/simple/test-stream-pipe-error-handling.js
+@@ -21,7 +21,7 @@
+ 
+ var common = require('../common');
+ var assert = require('assert');
+-var Stream = require('stream').Stream;
+var Stream = require('../../').Stream;
+ 
+ (function testErrorListenerCatches() {
+   var source = new Stream();
+diff --git a/test/simple/test-stream-pipe-event.js b/test/simple/test-stream-pipe-event.js
+index cb9d5fe..56f8d61 100644
+--- a/test/simple/test-stream-pipe-event.js
+++ b/test/simple/test-stream-pipe-event.js
+@@ -20,7 +20,7 @@
+ // USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ var common = require('../common');
+-var stream = require('stream');
+var stream = require('../../');
+ var assert = require('assert');
+ var util = require('util');
+ 
+diff --git a/test/simple/test-stream-push-order.js b/test/simple/test-stream-push-order.js
+index f2e6ec2..a5c9bf9 100644
+--- a/test/simple/test-stream-push-order.js
+++ b/test/simple/test-stream-push-order.js
+@@ -20,7 +20,7 @@
+ // USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ var common = require('../common.js');
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ var assert = require('assert');
+ 
+ var s = new Readable({
+diff --git a/test/simple/test-stream-push-strings.js b/test/simple/test-stream-push-strings.js
+index 06f43dc..1701a9a 100644
+--- a/test/simple/test-stream-push-strings.js
+++ b/test/simple/test-stream-push-strings.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ var util = require('util');
+ 
+ util.inherits(MyStream, Readable);
+diff --git a/test/simple/test-stream-readable-event.js b/test/simple/test-stream-readable-event.js
+index ba6a577..a8e6f7b 100644
+--- a/test/simple/test-stream-readable-event.js
+++ b/test/simple/test-stream-readable-event.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ 
+ (function first() {
+   // First test, not reading when the readable is added.
+diff --git a/test/simple/test-stream-readable-flow-recursion.js b/test/simple/test-stream-readable-flow-recursion.js
+index 2891ad6..11689ba 100644
+--- a/test/simple/test-stream-readable-flow-recursion.js
+++ b/test/simple/test-stream-readable-flow-recursion.js
+@@ -27,7 +27,7 @@ var assert = require('assert');
+ // more data continuously, but without triggering a nextTick
+ // warning or RangeError.
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ 
+ // throw an error if we trigger a nextTick warning.
+ process.throwDeprecation = true;
+diff --git a/test/simple/test-stream-unshift-empty-chunk.js b/test/simple/test-stream-unshift-empty-chunk.js
+index 0c96476..7827538 100644
+--- a/test/simple/test-stream-unshift-empty-chunk.js
+++ b/test/simple/test-stream-unshift-empty-chunk.js
+@@ -24,7 +24,7 @@ var assert = require('assert');
+ 
+ // This test verifies that stream.unshift(Buffer(0)) or 
+ // stream.unshift('') does not set state.reading=false.
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ 
+ var r = new Readable();
+ var nChunks = 10;
+diff --git a/test/simple/test-stream-unshift-read-race.js b/test/simple/test-stream-unshift-read-race.js
+index 83fd9fa..17c18aa 100644
+--- a/test/simple/test-stream-unshift-read-race.js
+++ b/test/simple/test-stream-unshift-read-race.js
+@@ -29,7 +29,7 @@ var assert = require('assert');
+ // 3. push() after the EOF signaling null is an error.
+ // 4. _read() is not called after pushing the EOF null chunk.
+ 
+-var stream = require('stream');
+var stream = require('../../');
+ var hwm = 10;
+ var r = stream.Readable({ highWaterMark: hwm });
+ var chunks = 10;
+@@ -51,7 +51,14 @@ r._read = function(n) {
+ 
+   function push(fast) {
+     assert(!pushedNull, 'push() after null push');
+-    var c = pos >= data.length ? null : data.slice(pos, pos + n);
+    var c;
+    if (pos >= data.length)
+      c = null;
+    else {
+      if (n + pos > data.length)
+        n = data.length - pos;
+      c = data.slice(pos, pos + n);
+    }
+     pushedNull = c === null;
+     if (fast) {
+       pos += n;
+diff --git a/test/simple/test-stream-writev.js b/test/simple/test-stream-writev.js
+index 5b49e6e..b5321f3 100644
+--- a/test/simple/test-stream-writev.js
+++ b/test/simple/test-stream-writev.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var stream = require('stream');
+var stream = require('../../');
+ 
+ var queue = [];
+ for (var decode = 0; decode < 2; decode++) {
+diff --git a/test/simple/test-stream2-basic.js b/test/simple/test-stream2-basic.js
+index 3814bf0..248c1be 100644
+--- a/test/simple/test-stream2-basic.js
+++ b/test/simple/test-stream2-basic.js
+@@ -21,7 +21,7 @@
+ 
+ 
+ var common = require('../common.js');
+-var R = require('_stream_readable');
+var R = require('../../lib/_stream_readable');
+ var assert = require('assert');
+ 
+ var util = require('util');
+diff --git a/test/simple/test-stream2-compatibility.js b/test/simple/test-stream2-compatibility.js
+index 6cdd4e9..f0fa84b 100644
+--- a/test/simple/test-stream2-compatibility.js
+++ b/test/simple/test-stream2-compatibility.js
+@@ -21,7 +21,7 @@
+ 
+ 
+ var common = require('../common.js');
+-var R = require('_stream_readable');
+var R = require('../../lib/_stream_readable');
+ var assert = require('assert');
+ 
+ var util = require('util');
+diff --git a/test/simple/test-stream2-finish-pipe.js b/test/simple/test-stream2-finish-pipe.js
+index 39b274f..006a19b 100644
+--- a/test/simple/test-stream2-finish-pipe.js
+++ b/test/simple/test-stream2-finish-pipe.js
+@@ -20,7 +20,7 @@
+ // USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ var common = require('../common.js');
+-var stream = require('stream');
+var stream = require('../../');
+ var Buffer = require('buffer').Buffer;
+ 
+ var r = new stream.Readable();
+diff --git a/test/simple/test-stream2-fs.js b/test/simple/test-stream2-fs.js
+deleted file mode 100644
+index e162406..0000000
+--- a/test/simple/test-stream2-fs.js
+++ /dev/null
+@@ -1,72 +0,0 @@
+-// Copyright Joyent, Inc. and other Node contributors.
+-//
+-// Permission is hereby granted, free of charge, to any person obtaining a
+-// copy of this software and associated documentation files (the
+-// "Software"), to deal in the Software without restriction, including
+-// without limitation the rights to use, copy, modify, merge, publish,
+-// distribute, sublicense, and/or sell copies of the Software, and to permit
+-// persons to whom the Software is furnished to do so, subject to the
+-// following conditions:
+-//
+-// The above copyright notice and this permission notice shall be included
+-// in all copies or substantial portions of the Software.
+-//
+-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+-
+-
+-var common = require('../common.js');
+-var R = require('_stream_readable');
+-var assert = require('assert');
+-
+-var fs = require('fs');
+-var FSReadable = fs.ReadStream;
+-
+-var path = require('path');
+-var file = path.resolve(common.fixturesDir, 'x1024.txt');
+-
+-var size = fs.statSync(file).size;
+-
+-var expectLengths = [1024];
+-
+-var util = require('util');
+-var Stream = require('stream');
+-
+-util.inherits(TestWriter, Stream);
+-
+-function TestWriter() {
+-  Stream.apply(this);
+-  this.buffer = [];
+-  this.length = 0;
+-}
+-
+-TestWriter.prototype.write = function(c) {
+-  this.buffer.push(c.toString());
+-  this.length += c.length;
+-  return true;
+-};
+-
+-TestWriter.prototype.end = function(c) {
+-  if (c) this.buffer.push(c.toString());
+-  this.emit('results', this.buffer);
+-}
+-
+-var r = new FSReadable(file);
+-var w = new TestWriter();
+-
+-w.on('results', function(res) {
+-  console.error(res, w.length);
+-  assert.equal(w.length, size);
+-  var l = 0;
+-  assert.deepEqual(res.map(function (c) {
+-    return c.length;
+-  }), expectLengths);
+-  console.log('ok');
+-});
+-
+-r.pipe(w);
+diff --git a/test/simple/test-stream2-httpclient-response-end.js b/test/simple/test-stream2-httpclient-response-end.js
+deleted file mode 100644
+index 15cffc2..0000000
+--- a/test/simple/test-stream2-httpclient-response-end.js
+++ /dev/null
+@@ -1,52 +0,0 @@
+-// Copyright Joyent, Inc. and other Node contributors.
+-//
+-// Permission is hereby granted, free of charge, to any person obtaining a
+-// copy of this software and associated documentation files (the
+-// "Software"), to deal in the Software without restriction, including
+-// without limitation the rights to use, copy, modify, merge, publish,
+-// distribute, sublicense, and/or sell copies of the Software, and to permit
+-// persons to whom the Software is furnished to do so, subject to the
+-// following conditions:
+-//
+-// The above copyright notice and this permission notice shall be included
+-// in all copies or substantial portions of the Software.
+-//
+-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+-// USE OR OTHER DEALINGS IN THE SOFTWARE.
+-
+-var common = require('../common.js');
+-var assert = require('assert');
+-var http = require('http');
+-var msg = 'Hello';
+-var readable_event = false;
+-var end_event = false;
+-var server = http.createServer(function(req, res) {
+-  res.writeHead(200, {'Content-Type': 'text/plain'});
+-  res.end(msg);
+-}).listen(common.PORT, function() {
+-  http.get({port: common.PORT}, function(res) {
+-    var data = '';
+-    res.on('readable', function() {
+-      console.log('readable event');
+-      readable_event = true;
+-      data += res.read();
+-    });
+-    res.on('end', function() {
+-      console.log('end event');
+-      end_event = true;
+-      assert.strictEqual(msg, data);
+-      server.close();
+-    });
+-  });
+-});
+-
+-process.on('exit', function() {
+-  assert(readable_event);
+-  assert(end_event);
+-});
+-
+diff --git a/test/simple/test-stream2-large-read-stall.js b/test/simple/test-stream2-large-read-stall.js
+index 2fbfbca..667985b 100644
+--- a/test/simple/test-stream2-large-read-stall.js
+++ b/test/simple/test-stream2-large-read-stall.js
+@@ -30,7 +30,7 @@ var PUSHSIZE = 20;
+ var PUSHCOUNT = 1000;
+ var HWM = 50;
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ var r = new Readable({
+   highWaterMark: HWM
+ });
+@@ -39,23 +39,23 @@ var rs = r._readableState;
+ r._read = push;
+ 
+ r.on('readable', function() {
+-  console.error('>> readable');
+  //console.error('>> readable');
+   do {
+-    console.error('  > read(%d)', READSIZE);
+    //console.error('  > read(%d)', READSIZE);
+     var ret = r.read(READSIZE);
+-    console.error('  < %j (%d remain)', ret && ret.length, rs.length);
+    //console.error('  < %j (%d remain)', ret && ret.length, rs.length);
+   } while (ret && ret.length === READSIZE);
+ 
+-  console.error('<< after read()',
+-                ret && ret.length,
+-                rs.needReadable,
+-                rs.length);
+  //console.error('<< after read()',
+  //              ret && ret.length,
+  //              rs.needReadable,
+  //              rs.length);
+ });
+ 
+ var endEmitted = false;
+ r.on('end', function() {
+   endEmitted = true;
+-  console.error('end');
+  //console.error('end');
+ });
+ 
+ var pushes = 0;
+@@ -64,11 +64,11 @@ function push() {
+     return;
+ 
+   if (pushes++ === PUSHCOUNT) {
+-    console.error('   push(EOF)');
+    //console.error('   push(EOF)');
+     return r.push(null);
+   }
+ 
+-  console.error('   push #%d', pushes);
+  //console.error('   push #%d', pushes);
+   if (r.push(new Buffer(PUSHSIZE)))
+     setTimeout(push);
+ }
+diff --git a/test/simple/test-stream2-objects.js b/test/simple/test-stream2-objects.js
+index 3e6931d..ff47d89 100644
+--- a/test/simple/test-stream2-objects.js
+++ b/test/simple/test-stream2-objects.js
+@@ -21,8 +21,8 @@
+ 
+ 
+ var common = require('../common.js');
+-var Readable = require('_stream_readable');
+-var Writable = require('_stream_writable');
+var Readable = require('../../lib/_stream_readable');
+var Writable = require('../../lib/_stream_writable');
+ var assert = require('assert');
+ 
+ // tiny node-tap lookalike.
+diff --git a/test/simple/test-stream2-pipe-error-handling.js b/test/simple/test-stream2-pipe-error-handling.js
+index cf7531c..e3f3e4e 100644
+--- a/test/simple/test-stream2-pipe-error-handling.js
+++ b/test/simple/test-stream2-pipe-error-handling.js
+@@ -21,7 +21,7 @@
+ 
+ var common = require('../common');
+ var assert = require('assert');
+-var stream = require('stream');
+var stream = require('../../');
+ 
+ (function testErrorListenerCatches() {
+   var count = 1000;
+diff --git a/test/simple/test-stream2-pipe-error-once-listener.js b/test/simple/test-stream2-pipe-error-once-listener.js
+index 5e8e3cb..53b2616 100755
+--- a/test/simple/test-stream2-pipe-error-once-listener.js
+++ b/test/simple/test-stream2-pipe-error-once-listener.js
+@@ -24,7 +24,7 @@ var common = require('../common.js');
+ var assert = require('assert');
+ 
+ var util = require('util');
+-var stream = require('stream');
+var stream = require('../../');
+ 
+ 
+ var Read = function() {
+diff --git a/test/simple/test-stream2-push.js b/test/simple/test-stream2-push.js
+index b63edc3..eb2b0e9 100644
+--- a/test/simple/test-stream2-push.js
+++ b/test/simple/test-stream2-push.js
+@@ -20,7 +20,7 @@
+ // USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ var common = require('../common.js');
+-var stream = require('stream');
+var stream = require('../../');
+ var Readable = stream.Readable;
+ var Writable = stream.Writable;
+ var assert = require('assert');
+diff --git a/test/simple/test-stream2-read-sync-stack.js b/test/simple/test-stream2-read-sync-stack.js
+index e8a7305..9740a47 100644
+--- a/test/simple/test-stream2-read-sync-stack.js
+++ b/test/simple/test-stream2-read-sync-stack.js
+@@ -21,7 +21,7 @@
+ 
+ var common = require('../common');
+ var assert = require('assert');
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ var r = new Readable();
+ var N = 256 * 1024;
+ 
+diff --git a/test/simple/test-stream2-readable-empty-buffer-no-eof.js b/test/simple/test-stream2-readable-empty-buffer-no-eof.js
+index cd30178..4b1659d 100644
+--- a/test/simple/test-stream2-readable-empty-buffer-no-eof.js
+++ b/test/simple/test-stream2-readable-empty-buffer-no-eof.js
+@@ -22,10 +22,9 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('stream').Readable;
+var Readable = require('../../').Readable;
+ 
+ test1();
+-test2();
+ 
+ function test1() {
+   var r = new Readable();
+@@ -88,31 +87,3 @@ function test1() {
+     console.log('ok');
+   });
+ }
+-
+-function test2() {
+-  var r = new Readable({ encoding: 'base64' });
+-  var reads = 5;
+-  r._read = function(n) {
+-    if (!reads--)
+-      return r.push(null); // EOF
+-    else
+-      return r.push(new Buffer('x'));
+-  };
+-
+-  var results = [];
+-  function flow() {
+-    var chunk;
+-    while (null !== (chunk = r.read()))
+-      results.push(chunk + '');
+-  }
+-  r.on('readable', flow);
+-  r.on('end', function() {
+-    results.push('EOF');
+-  });
+-  flow();
+-
+-  process.on('exit', function() {
+-    assert.deepEqual(results, [ 'eHh4', 'eHg=', 'EOF' ]);
+-    console.log('ok');
+-  });
+-}
+diff --git a/test/simple/test-stream2-readable-from-list.js b/test/simple/test-stream2-readable-from-list.js
+index 7c96ffe..04a96f5 100644
+--- a/test/simple/test-stream2-readable-from-list.js
+++ b/test/simple/test-stream2-readable-from-list.js
+@@ -21,7 +21,7 @@
+ 
+ var assert = require('assert');
+ var common = require('../common.js');
+-var fromList = require('_stream_readable')._fromList;
+var fromList = require('../../lib/_stream_readable')._fromList;
+ 
+ // tiny node-tap lookalike.
+ var tests = [];
+diff --git a/test/simple/test-stream2-readable-legacy-drain.js b/test/simple/test-stream2-readable-legacy-drain.js
+index 675da8e..51fd3d5 100644
+--- a/test/simple/test-stream2-readable-legacy-drain.js
+++ b/test/simple/test-stream2-readable-legacy-drain.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Stream = require('stream');
+var Stream = require('../../');
+ var Readable = Stream.Readable;
+ 
+ var r = new Readable();
+diff --git a/test/simple/test-stream2-readable-non-empty-end.js b/test/simple/test-stream2-readable-non-empty-end.js
+index 7314ae7..c971898 100644
+--- a/test/simple/test-stream2-readable-non-empty-end.js
+++ b/test/simple/test-stream2-readable-non-empty-end.js
+@@ -21,7 +21,7 @@
+ 
+ var assert = require('assert');
+ var common = require('../common.js');
+-var Readable = require('_stream_readable');
+var Readable = require('../../lib/_stream_readable');
+ 
+ var len = 0;
+ var chunks = new Array(10);
+diff --git a/test/simple/test-stream2-readable-wrap-empty.js b/test/simple/test-stream2-readable-wrap-empty.js
+index 2e5cf25..fd8a3dc 100644
+--- a/test/simple/test-stream2-readable-wrap-empty.js
+++ b/test/simple/test-stream2-readable-wrap-empty.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('_stream_readable');
+var Readable = require('../../lib/_stream_readable');
+ var EE = require('events').EventEmitter;
+ 
+ var oldStream = new EE();
+diff --git a/test/simple/test-stream2-readable-wrap.js b/test/simple/test-stream2-readable-wrap.js
+index 90eea01..6b177f7 100644
+--- a/test/simple/test-stream2-readable-wrap.js
+++ b/test/simple/test-stream2-readable-wrap.js
+@@ -22,8 +22,8 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var Readable = require('_stream_readable');
+-var Writable = require('_stream_writable');
+var Readable = require('../../lib/_stream_readable');
+var Writable = require('../../lib/_stream_writable');
+ var EE = require('events').EventEmitter;
+ 
+ var testRuns = 0, completedRuns = 0;
+diff --git a/test/simple/test-stream2-set-encoding.js b/test/simple/test-stream2-set-encoding.js
+index 5d2c32a..685531b 100644
+--- a/test/simple/test-stream2-set-encoding.js
+++ b/test/simple/test-stream2-set-encoding.js
+@@ -22,7 +22,7 @@
+ 
+ var common = require('../common.js');
+ var assert = require('assert');
+-var R = require('_stream_readable');
+var R = require('../../lib/_stream_readable');
+ var util = require('util');
+ 
+ // tiny node-tap lookalike.
+diff --git a/test/simple/test-stream2-transform.js b/test/simple/test-stream2-transform.js
+index 9c9ddd8..a0cacc6 100644
+--- a/test/simple/test-stream2-transform.js
+++ b/test/simple/test-stream2-transform.js
+@@ -21,8 +21,8 @@
+ 
+ var assert = require('assert');
+ var common = require('../common.js');
+-var PassThrough = require('_stream_passthrough');
+-var Transform = require('_stream_transform');
+var PassThrough = require('../../').PassThrough;
+var Transform = require('../../').Transform;
+ 
+ // tiny node-tap lookalike.
+ var tests = [];
+diff --git a/test/simple/test-stream2-unpipe-drain.js b/test/simple/test-stream2-unpipe-drain.js
+index d66dc3c..365b327 100644
+--- a/test/simple/test-stream2-unpipe-drain.js
+++ b/test/simple/test-stream2-unpipe-drain.js
+@@ -22,7 +22,7 @@
+ 
+ var common = require('../common.js');
+ var assert = require('assert');
+-var stream = require('stream');
+var stream = require('../../');
+ var crypto = require('crypto');
+ 
+ var util = require('util');
+diff --git a/test/simple/test-stream2-unpipe-leak.js b/test/simple/test-stream2-unpipe-leak.js
+index 99f8746..17c92ae 100644
+--- a/test/simple/test-stream2-unpipe-leak.js
+++ b/test/simple/test-stream2-unpipe-leak.js
+@@ -22,7 +22,7 @@
+ 
+ var common = require('../common.js');
+ var assert = require('assert');
+-var stream = require('stream');
+var stream = require('../../');
+ 
+ var chunk = new Buffer('hallo');
+ 
+diff --git a/test/simple/test-stream2-writable.js b/test/simple/test-stream2-writable.js
+index 704100c..209c3a6 100644
+--- a/test/simple/test-stream2-writable.js
+++ b/test/simple/test-stream2-writable.js
+@@ -20,8 +20,8 @@
+ // USE OR OTHER DEALINGS IN THE SOFTWARE.
+ 
+ var common = require('../common.js');
+-var W = require('_stream_writable');
+-var D = require('_stream_duplex');
+var W = require('../../').Writable;
+var D = require('../../').Duplex;
+ var assert = require('assert');
+ 
+ var util = require('util');
+diff --git a/test/simple/test-stream3-pause-then-read.js b/test/simple/test-stream3-pause-then-read.js
+index b91bde3..2f72c15 100644
+--- a/test/simple/test-stream3-pause-then-read.js
+++ b/test/simple/test-stream3-pause-then-read.js
+@@ -22,7 +22,7 @@
+ var common = require('../common');
+ var assert = require('assert');
+ 
+-var stream = require('stream');
+var stream = require('../../');
+ var Readable = stream.Readable;
+ var Writable = stream.Writable;
+ 
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_duplex.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_duplex.js
@ -0,0 +1,89 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+module.exports = Duplex;
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+}
+/*</replacement>*/
+
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+
+util.inherits(Duplex, Readable);
+
+forEach(objectKeys(Writable.prototype), function(method) {
+  if (!Duplex.prototype[method])
+    Duplex.prototype[method] = Writable.prototype[method];
+});
+
+function Duplex(options) {
+  if (!(this instanceof Duplex))
+    return new Duplex(options);
+
+  Readable.call(this, options);
+  Writable.call(this, options);
+
+  if (options && options.readable === false)
+    this.readable = false;
+
+  if (options && options.writable === false)
+    this.writable = false;
+
+  this.allowHalfOpen = true;
+  if (options && options.allowHalfOpen === false)
+    this.allowHalfOpen = false;
+
+  this.once('end', onend);
+}
+
+// the no-half-open enforcer
+function onend() {
+  // if we allow half-open state, or if the writable side ended,
+  // then we're ok.
+  if (this.allowHalfOpen || this._writableState.ended)
+    return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  process.nextTick(this.end.bind(this));
+}
+
+function forEach (xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
+  }
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_passthrough.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_passthrough.js
@ -0,0 +1,46 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+module.exports = PassThrough;
+
+var Transform = require('./_stream_transform');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(PassThrough, Transform);
+
+function PassThrough(options) {
+  if (!(this instanceof PassThrough))
+    return new PassThrough(options);
+
+  Transform.call(this, options);
+}
+
+PassThrough.prototype._transform = function(chunk, encoding, cb) {
+  cb(null, chunk);
+};
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_readable.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_readable.js
@ -0,0 +1,951 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module.exports = Readable;
+
+/*<replacement>*/
+var isArray = require('isarray');
+/*</replacement>*/
+
+
+/*<replacement>*/
+var Buffer = require('buffer').Buffer;
+/*</replacement>*/
+
+Readable.ReadableState = ReadableState;
+
+var EE = require('events').EventEmitter;
+
+/*<replacement>*/
+if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+var Stream = require('stream');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var StringDecoder;
+
+
+/*<replacement>*/
+var debug = require('util');
+if (debug && debug.debuglog) {
+  debug = debug.debuglog('stream');
+} else {
+  debug = function () {};
+}
+/*</replacement>*/
+
+
+util.inherits(Readable, Stream);
+
+function ReadableState(options, stream) {
+  var Duplex = require('./_stream_duplex');
+
+  options = options || {};
+
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  var hwm = options.highWaterMark;
+  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+
+  // cast to ints.
+  this.highWaterMark = ~~this.highWaterMark;
+
+  this.buffer = [];
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+
+
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+
+  if (stream instanceof Duplex)
+    this.objectMode = this.objectMode || !!options.readableObjectMode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // when piping, we only care about 'readable' events that happen
+  // after read()ing all the bytes and not getting any pushback.
+  this.ranOut = false;
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder)
+      StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
+}
+
+function Readable(options) {
+  var Duplex = require('./_stream_duplex');
+
+  if (!(this instanceof Readable))
+    return new Readable(options);
+
+  this._readableState = new ReadableState(options, this);
+
+  // legacy
+  this.readable = true;
+
+  Stream.call(this);
+}
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function(chunk, encoding) {
+  var state = this._readableState;
+
+  if (util.isString(chunk) && !state.objectMode) {
+    encoding = encoding || state.defaultEncoding;
+    if (encoding !== state.encoding) {
+      chunk = new Buffer(chunk, encoding);
+      encoding = '';
+    }
+  }
+
+  return readableAddChunk(this, state, chunk, encoding, false);
+};
+
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function(chunk) {
+  var state = this._readableState;
+  return readableAddChunk(this, state, chunk, '', true);
+};
+
+function readableAddChunk(stream, state, chunk, encoding, addToFront) {
+  var er = chunkInvalid(state, chunk);
+  if (er) {
+    stream.emit('error', er);
+  } else if (util.isNullOrUndefined(chunk)) {
+    state.reading = false;
+    if (!state.ended)
+      onEofChunk(stream, state);
+  } else if (state.objectMode || chunk && chunk.length > 0) {
+    if (state.ended && !addToFront) {
+      var e = new Error('stream.push() after EOF');
+      stream.emit('error', e);
+    } else if (state.endEmitted && addToFront) {
+      var e = new Error('stream.unshift() after end event');
+      stream.emit('error', e);
+    } else {
+      if (state.decoder && !addToFront && !encoding)
+        chunk = state.decoder.write(chunk);
+
+      if (!addToFront)
+        state.reading = false;
+
+      // if we want the data now, just emit it.
+      if (state.flowing && state.length === 0 && !state.sync) {
+        stream.emit('data', chunk);
+        stream.read(0);
+      } else {
+        // update the buffer info.
+        state.length += state.objectMode ? 1 : chunk.length;
+        if (addToFront)
+          state.buffer.unshift(chunk);
+        else
+          state.buffer.push(chunk);
+
+        if (state.needReadable)
+          emitReadable(stream);
+      }
+
+      maybeReadMore(stream, state);
+    }
+  } else if (!addToFront) {
+    state.reading = false;
+  }
+
+  return needMoreData(state);
+}
+
+
+
+// if it's past the high water mark, we can push in some more.
+// Also, if we have no data yet, we can stand some
+// more bytes.  This is to work around cases where hwm=0,
+// such as the repl.  Also, if the push() triggered a
+// readable event, and the user called read(largeNumber) such that
+// needReadable was set, then we ought to push more, so that another
+// 'readable' event will be triggered.
+function needMoreData(state) {
+  return !state.ended &&
+         (state.needReadable ||
+          state.length < state.highWaterMark ||
+          state.length === 0);
+}
+
+// backwards compatibility.
+Readable.prototype.setEncoding = function(enc) {
+  if (!StringDecoder)
+    StringDecoder = require('string_decoder/').StringDecoder;
+  this._readableState.decoder = new StringDecoder(enc);
+  this._readableState.encoding = enc;
+  return this;
+};
+
+// Don't raise the hwm > 128MB
+var MAX_HWM = 0x800000;
+function roundUpToNextPowerOf2(n) {
+  if (n >= MAX_HWM) {
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2
+    n--;
+    for (var p = 1; p < 32; p <<= 1) n |= n >> p;
+    n++;
+  }
+  return n;
+}
+
+function howMuchToRead(n, state) {
+  if (state.length === 0 && state.ended)
+    return 0;
+
+  if (state.objectMode)
+    return n === 0 ? 0 : 1;
+
+  if (isNaN(n) || util.isNull(n)) {
+    // only flow one buffer at a time
+    if (state.flowing && state.buffer.length)
+      return state.buffer[0].length;
+    else
+      return state.length;
+  }
+
+  if (n <= 0)
+    return 0;
+
+  // If we're asking for more than the target buffer level,
+  // then raise the water mark.  Bump up to the next highest
+  // power of 2, to prevent increasing it excessively in tiny
+  // amounts.
+  if (n > state.highWaterMark)
+    state.highWaterMark = roundUpToNextPowerOf2(n);
+
+  // don't have that much.  return null, unless we've ended.
+  if (n > state.length) {
+    if (!state.ended) {
+      state.needReadable = true;
+      return 0;
+    } else
+      return state.length;
+  }
+
+  return n;
+}
+
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function(n) {
+  debug('read', n);
+  var state = this._readableState;
+  var nOrig = n;
+
+  if (!util.isNumber(n) || n > 0)
+    state.emittedReadable = false;
+
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 &&
+      state.needReadable &&
+      (state.length >= state.highWaterMark || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended)
+      endReadable(this);
+    else
+      emitReadable(this);
+    return null;
+  }
+
+  n = howMuchToRead(n, state);
+
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0)
+      endReadable(this);
+    return null;
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
+
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
+
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  }
+
+  if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0)
+      state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+  }
+
+  // If _read pushed data synchronously, then `reading` will be false,
+  // and we need to re-evaluate how much data we can return to the user.
+  if (doRead && !state.reading)
+    n = howMuchToRead(nOrig, state);
+
+  var ret;
+  if (n > 0)
+    ret = fromList(n, state);
+  else
+    ret = null;
+
+  if (util.isNull(ret)) {
+    state.needReadable = true;
+    n = 0;
+  }
+
+  state.length -= n;
+
+  // If we have nothing in the buffer, then we want to know
+  // as soon as we *do* get something into the buffer.
+  if (state.length === 0 && !state.ended)
+    state.needReadable = true;
+
+  // If we tried to read() past the EOF, then emit end on the next tick.
+  if (nOrig !== n && state.ended && state.length === 0)
+    endReadable(this);
+
+  if (!util.isNull(ret))
+    this.emit('data', ret);
+
+  return ret;
+};
+
+function chunkInvalid(state, chunk) {
+  var er = null;
+  if (!util.isBuffer(chunk) &&
+      !util.isString(chunk) &&
+      !util.isNullOrUndefined(chunk) &&
+      !state.objectMode) {
+    er = new TypeError('Invalid non-string/buffer chunk');
+  }
+  return er;
+}
+
+
+function onEofChunk(stream, state) {
+  if (state.decoder && !state.ended) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
+    }
+  }
+  state.ended = true;
+
+  // emit 'readable' now to make sure it gets picked up.
+  emitReadable(stream);
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    if (state.sync)
+      process.nextTick(function() {
+        emitReadable_(stream);
+      });
+    else
+      emitReadable_(stream);
+  }
+}
+
+function emitReadable_(stream) {
+  debug('emit readable');
+  stream.emit('readable');
+  flow(stream);
+}
+
+
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    process.nextTick(function() {
+      maybeReadMore_(stream, state);
+    });
+  }
+}
+
+function maybeReadMore_(stream, state) {
+  var len = state.length;
+  while (!state.reading && !state.flowing && !state.ended &&
+         state.length < state.highWaterMark) {
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;
+    else
+      len = state.length;
+  }
+  state.readingMore = false;
+}
+
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function(n) {
+  this.emit('error', new Error('not implemented'));
+};
+
+Readable.prototype.pipe = function(dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
+  }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
+
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
+              dest !== process.stdout &&
+              dest !== process.stderr;
+
+  var endFn = doEnd ? onend : cleanup;
+  if (state.endEmitted)
+    process.nextTick(endFn);
+  else
+    src.once('end', endFn);
+
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable) {
+    debug('onunpipe');
+    if (readable === src) {
+      cleanup();
+    }
+  }
+
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
+
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
+
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', cleanup);
+    src.removeListener('data', ondata);
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain &&
+        (!dest._writableState || dest._writableState.needDrain))
+      ondrain();
+  }
+
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    var ret = dest.write(chunk);
+    if (false === ret) {
+      debug('false write response, pause',
+            src._readableState.awaitDrain);
+      src._readableState.awaitDrain++;
+      src.pause();
+    }
+  }
+
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EE.listenerCount(dest, 'error') === 0)
+      dest.emit('error', er);
+  }
+  // This is a brutally ugly hack to make sure that our error handler
+  // is attached before any userland ones.  NEVER DO THIS.
+  if (!dest._events || !dest._events.error)
+    dest.on('error', onerror);
+  else if (isArray(dest._events.error))
+    dest._events.error.unshift(onerror);
+  else
+    dest._events.error = [onerror, dest._events.error];
+
+
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
+
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
+
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
+
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
+
+  return dest;
+};
+
+function pipeOnDrain(src) {
+  return function() {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain)
+      state.awaitDrain--;
+    if (state.awaitDrain === 0 && EE.listenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
+
+
+Readable.prototype.unpipe = function(dest) {
+  var state = this._readableState;
+
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0)
+    return this;
+
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes)
+      return this;
+
+    if (!dest)
+      dest = state.pipes;
+
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest)
+      dest.emit('unpipe', this);
+    return this;
+  }
+
+  // slow case. multiple pipe destinations.
+
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+
+    for (var i = 0; i < len; i++)
+      dests[i].emit('unpipe', this);
+    return this;
+  }
+
+  // try to find the right one.
+  var i = indexOf(state.pipes, dest);
+  if (i === -1)
+    return this;
+
+  state.pipes.splice(i, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1)
+    state.pipes = state.pipes[0];
+
+  dest.emit('unpipe', this);
+
+  return this;
+};
+
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function(ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
+
+  // If listening to data, and it has not explicitly been paused,
+  // then call resume to start the flow of data on the next tick.
+  if (ev === 'data' && false !== this._readableState.flowing) {
+    this.resume();
+  }
+
+  if (ev === 'readable' && this.readable) {
+    var state = this._readableState;
+    if (!state.readableListening) {
+      state.readableListening = true;
+      state.emittedReadable = false;
+      state.needReadable = true;
+      if (!state.reading) {
+        var self = this;
+        process.nextTick(function() {
+          debug('readable nexttick read 0');
+          self.read(0);
+        });
+      } else if (state.length) {
+        emitReadable(this, state);
+      }
+    }
+  }
+
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function() {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    state.flowing = true;
+    if (!state.reading) {
+      debug('resume read 0');
+      this.read(0);
+    }
+    resume(this, state);
+  }
+  return this;
+};
+
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    process.nextTick(function() {
+      resume_(stream, state);
+    });
+  }
+}
+
+function resume_(stream, state) {
+  state.resumeScheduled = false;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading)
+    stream.read(0);
+}
+
+Readable.prototype.pause = function() {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (false !== this._readableState.flowing) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  return this;
+};
+
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  if (state.flowing) {
+    do {
+      var chunk = stream.read();
+    } while (null !== chunk && state.flowing);
+  }
+}
+
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function(stream) {
+  var state = this._readableState;
+  var paused = false;
+
+  var self = this;
+  stream.on('end', function() {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length)
+        self.push(chunk);
+    }
+
+    self.push(null);
+  });
+
+  stream.on('data', function(chunk) {
+    debug('wrapped data');
+    if (state.decoder)
+      chunk = state.decoder.write(chunk);
+    if (!chunk || !state.objectMode && !chunk.length)
+      return;
+
+    var ret = self.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
+
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (util.isFunction(stream[i]) && util.isUndefined(this[i])) {
+      this[i] = function(method) { return function() {
+        return stream[method].apply(stream, arguments);
+      }}(i);
+    }
+  }
+
+  // proxy certain important events.
+  var events = ['error', 'close', 'destroy', 'pause', 'resume'];
+  forEach(events, function(ev) {
+    stream.on(ev, self.emit.bind(self, ev));
+  });
+
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  self._read = function(n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
+
+  return self;
+};
+
+
+
+// exposed for testing purposes only.
+Readable._fromList = fromList;
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+function fromList(n, state) {
+  var list = state.buffer;
+  var length = state.length;
+  var stringMode = !!state.decoder;
+  var objectMode = !!state.objectMode;
+  var ret;
+
+  // nothing in the list, definitely empty.
+  if (list.length === 0)
+    return null;
+
+  if (length === 0)
+    ret = null;
+  else if (objectMode)
+    ret = list.shift();
+  else if (!n || n >= length) {
+    // read it all, truncate the array.
+    if (stringMode)
+      ret = list.join('');
+    else
+      ret = Buffer.concat(list, length);
+    list.length = 0;
+  } else {
+    // read just some of it.
+    if (n < list[0].length) {
+      // just take a part of the first list item.
+      // slice is the same for buffers and strings.
+      var buf = list[0];
+      ret = buf.slice(0, n);
+      list[0] = buf.slice(n);
+    } else if (n === list[0].length) {
+      // first list is a perfect match
+      ret = list.shift();
+    } else {
+      // complex case.
+      // we have enough to cover it, but it spans past the first buffer.
+      if (stringMode)
+        ret = '';
+      else
+        ret = new Buffer(n);
+
+      var c = 0;
+      for (var i = 0, l = list.length; i < l && c < n; i++) {
+        var buf = list[0];
+        var cpy = Math.min(n - c, buf.length);
+
+        if (stringMode)
+          ret += buf.slice(0, cpy);
+        else
+          buf.copy(ret, c, 0, cpy);
+
+        if (cpy < buf.length)
+          list[0] = buf.slice(cpy);
+        else
+          list.shift();
+
+        c += cpy;
+      }
+    }
+  }
+
+  return ret;
+}
+
+function endReadable(stream) {
+  var state = stream._readableState;
+
+  // If we get here before consuming all the bytes, then that is a
+  // bug in node.  Should never happen.
+  if (state.length > 0)
+    throw new Error('endReadable called on non-empty stream');
+
+  if (!state.endEmitted) {
+    state.ended = true;
+    process.nextTick(function() {
+      // Check that we didn't get one last unshift.
+      if (!state.endEmitted && state.length === 0) {
+        state.endEmitted = true;
+        stream.readable = false;
+        stream.emit('end');
+      }
+    });
+  }
+}
+
+function forEach (xs, f) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    f(xs[i], i);
+  }
+}
+
+function indexOf (xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
+  }
+  return -1;
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_transform.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_transform.js
@ -0,0 +1,209 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+module.exports = Transform;
+
+var Duplex = require('./_stream_duplex');
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+util.inherits(Transform, Duplex);
+
+
+function TransformState(options, stream) {
+  this.afterTransform = function(er, data) {
+    return afterTransform(stream, er, data);
+  };
+
+  this.needTransform = false;
+  this.transforming = false;
+  this.writecb = null;
+  this.writechunk = null;
+}
+
+function afterTransform(stream, er, data) {
+  var ts = stream._transformState;
+  ts.transforming = false;
+
+  var cb = ts.writecb;
+
+  if (!cb)
+    return stream.emit('error', new Error('no writecb in Transform class'));
+
+  ts.writechunk = null;
+  ts.writecb = null;
+
+  if (!util.isNullOrUndefined(data))
+    stream.push(data);
+
+  if (cb)
+    cb(er);
+
+  var rs = stream._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    stream._read(rs.highWaterMark);
+  }
+}
+
+
+function Transform(options) {
+  if (!(this instanceof Transform))
+    return new Transform(options);
+
+  Duplex.call(this, options);
+
+  this._transformState = new TransformState(options, this);
+
+  // when the writable side finishes, then flush out anything remaining.
+  var stream = this;
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+
+  this.once('prefinish', function() {
+    if (util.isFunction(this._flush))
+      this._flush(function(er) {
+        done(stream, er);
+      });
+    else
+      done(stream);
+  });
+}
+
+Transform.prototype.push = function(chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function(chunk, encoding, cb) {
+  throw new Error('not implemented');
+};
+
+Transform.prototype._write = function(chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform ||
+        rs.needReadable ||
+        rs.length < rs.highWaterMark)
+      this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function(n) {
+  var ts = this._transformState;
+
+  if (!util.isNull(ts.writechunk) && ts.writecb && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+
+
+function done(stream, er) {
+  if (er)
+    return stream.emit('error', er);
+
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  var ws = stream._writableState;
+  var ts = stream._transformState;
+
+  if (ws.length)
+    throw new Error('calling transform done when ws.length != 0');
+
+  if (ts.transforming)
+    throw new Error('calling transform done when still transforming');
+
+  return stream.push(null);
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_writable.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/lib/_stream_writable.js
@ -0,0 +1,477 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, cb), and it'll handle all
+// the drain event emission and buffering.
+
+module.exports = Writable;
+
+/*<replacement>*/
+var Buffer = require('buffer').Buffer;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+
+/*<replacement>*/
+var util = require('core-util-is');
+util.inherits = require('inherits');
+/*</replacement>*/
+
+var Stream = require('stream');
+
+util.inherits(Writable, Stream);
+
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+}
+
+function WritableState(options, stream) {
+  var Duplex = require('./_stream_duplex');
+
+  options = options || {};
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  var hwm = options.highWaterMark;
+  var defaultHwm = options.objectMode ? 16 : 16 * 1024;
+  this.highWaterMark = (hwm || hwm === 0) ? hwm : defaultHwm;
+
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
+
+  if (stream instanceof Duplex)
+    this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // cast to ints.
+  this.highWaterMark = ~~this.highWaterMark;
+
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
+
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
+
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
+
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
+
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function(er) {
+    onwrite(stream, er);
+  };
+
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
+
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+
+  this.buffer = [];
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+}
+
+function Writable(options) {
+  var Duplex = require('./_stream_duplex');
+
+  // Writable ctor is applied to Duplexes, though they're not
+  // instanceof Writable, they're instanceof Readable.
+  if (!(this instanceof Writable) && !(this instanceof Duplex))
+    return new Writable(options);
+
+  this._writableState = new WritableState(options, this);
+
+  // legacy.
+  this.writable = true;
+
+  Stream.call(this);
+}
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function() {
+  this.emit('error', new Error('Cannot pipe. Not readable.'));
+};
+
+
+function writeAfterEnd(stream, state, cb) {
+  var er = new Error('write after end');
+  // TODO: defer error events consistently everywhere, not just the cb
+  stream.emit('error', er);
+  process.nextTick(function() {
+    cb(er);
+  });
+}
+
+// If we get something that is not a buffer, string, null, or undefined,
+// and we're not in objectMode, then that's an error.
+// Otherwise stream chunks are all considered to be of length=1, and the
+// watermarks determine how many objects to keep in the buffer, rather than
+// how many bytes or characters.
+function validChunk(stream, state, chunk, cb) {
+  var valid = true;
+  if (!util.isBuffer(chunk) &&
+      !util.isString(chunk) &&
+      !util.isNullOrUndefined(chunk) &&
+      !state.objectMode) {
+    var er = new TypeError('Invalid non-string/buffer chunk');
+    stream.emit('error', er);
+    process.nextTick(function() {
+      cb(er);
+    });
+    valid = false;
+  }
+  return valid;
+}
+
+Writable.prototype.write = function(chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
+
+  if (util.isFunction(encoding)) {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (util.isBuffer(chunk))
+    encoding = 'buffer';
+  else if (!encoding)
+    encoding = state.defaultEncoding;
+
+  if (!util.isFunction(cb))
+    cb = function() {};
+
+  if (state.ended)
+    writeAfterEnd(this, state, cb);
+  else if (validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, chunk, encoding, cb);
+  }
+
+  return ret;
+};
+
+Writable.prototype.cork = function() {
+  var state = this._writableState;
+
+  state.corked++;
+};
+
+Writable.prototype.uncork = function() {
+  var state = this._writableState;
+
+  if (state.corked) {
+    state.corked--;
+
+    if (!state.writing &&
+        !state.corked &&
+        !state.finished &&
+        !state.bufferProcessing &&
+        state.buffer.length)
+      clearBuffer(this, state);
+  }
+};
+
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode &&
+      state.decodeStrings !== false &&
+      util.isString(chunk)) {
+    chunk = new Buffer(chunk, encoding);
+  }
+  return chunk;
+}
+
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, chunk, encoding, cb) {
+  chunk = decodeChunk(state, chunk, encoding);
+  if (util.isBuffer(chunk))
+    encoding = 'buffer';
+  var len = state.objectMode ? 1 : chunk.length;
+
+  state.length += len;
+
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret)
+    state.needDrain = true;
+
+  if (state.writing || state.corked)
+    state.buffer.push(new WriteReq(chunk, encoding, cb));
+  else
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+
+  return ret;
+}
+
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (writev)
+    stream._writev(chunk, state.onwrite);
+  else
+    stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
+}
+
+function onwriteError(stream, state, sync, er, cb) {
+  if (sync)
+    process.nextTick(function() {
+      state.pendingcb--;
+      cb(er);
+    });
+  else {
+    state.pendingcb--;
+    cb(er);
+  }
+
+  stream._writableState.errorEmitted = true;
+  stream.emit('error', er);
+}
+
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
+
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
+
+  onwriteStateUpdate(state);
+
+  if (er)
+    onwriteError(stream, state, sync, er, cb);
+  else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(stream, state);
+
+    if (!finished &&
+        !state.corked &&
+        !state.bufferProcessing &&
+        state.buffer.length) {
+      clearBuffer(stream, state);
+    }
+
+    if (sync) {
+      process.nextTick(function() {
+        afterWrite(stream, state, finished, cb);
+      });
+    } else {
+      afterWrite(stream, state, finished, cb);
+    }
+  }
+}
+
+function afterWrite(stream, state, finished, cb) {
+  if (!finished)
+    onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
+
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
+
+
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+
+  if (stream._writev && state.buffer.length > 1) {
+    // Fast case, write everything using _writev()
+    var cbs = [];
+    for (var c = 0; c < state.buffer.length; c++)
+      cbs.push(state.buffer[c].callback);
+
+    // count the one we are adding, as well.
+    // TODO(isaacs) clean this up
+    state.pendingcb++;
+    doWrite(stream, state, true, state.length, state.buffer, '', function(err) {
+      for (var i = 0; i < cbs.length; i++) {
+        state.pendingcb--;
+        cbs[i](err);
+      }
+    });
+
+    // Clear buffer
+    state.buffer = [];
+  } else {
+    // Slow case, write chunks one-by-one
+    for (var c = 0; c < state.buffer.length; c++) {
+      var entry = state.buffer[c];
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
+
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        c++;
+        break;
+      }
+    }
+
+    if (c < state.buffer.length)
+      state.buffer = state.buffer.slice(c);
+    else
+      state.buffer.length = 0;
+  }
+
+  state.bufferProcessing = false;
+}
+
+Writable.prototype._write = function(chunk, encoding, cb) {
+  cb(new Error('not implemented'));
+
+};
+
+Writable.prototype._writev = null;
+
+Writable.prototype.end = function(chunk, encoding, cb) {
+  var state = this._writableState;
+
+  if (util.isFunction(chunk)) {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (util.isFunction(encoding)) {
+    cb = encoding;
+    encoding = null;
+  }
+
+  if (!util.isNullOrUndefined(chunk))
+    this.write(chunk, encoding);
+
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
+  }
+
+  // ignore unnecessary end() calls.
+  if (!state.ending && !state.finished)
+    endWritable(this, state, cb);
+};
+
+
+function needFinish(stream, state) {
+  return (state.ending &&
+          state.length === 0 &&
+          !state.finished &&
+          !state.writing);
+}
+
+function prefinish(stream, state) {
+  if (!state.prefinished) {
+    state.prefinished = true;
+    stream.emit('prefinish');
+  }
+}
+
+function finishMaybe(stream, state) {
+  var need = needFinish(stream, state);
+  if (need) {
+    if (state.pendingcb === 0) {
+      prefinish(stream, state);
+      state.finished = true;
+      stream.emit('finish');
+    } else
+      prefinish(stream, state);
+  }
+  return need;
+}
+
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished)
+      process.nextTick(cb);
+    else
+      stream.once('finish', cb);
+  }
+  state.ended = true;
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/package.json
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/package.json
@ -0,0 +1,32 @@
+{
+  "name": "readable-stream",
+  "version": "1.1.14",
+  "description": "Streams3, a user-land copy of the stream library from Node.js v0.11.x",
+  "main": "readable.js",
+  "dependencies": {
+    "core-util-is": "~1.0.0",
+    "isarray": "0.0.1",
+    "string_decoder": "~0.10.x",
+    "inherits": "~2.0.1"
+  },
+  "devDependencies": {
+    "tap": "~0.2.6"
+  },
+  "scripts": {
+    "test": "tap test/simple/*.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/readable-stream"
+  },
+  "keywords": [
+    "readable",
+    "stream",
+    "pipe"
+  ],
+  "browser": {
+    "util": false
+  },
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "MIT"
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/passthrough.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/passthrough.js
@ -0,0 +1 @@
+module.exports = require("./lib/_stream_passthrough.js")
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/readable.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/readable.js
@ -0,0 +1,10 @@
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = require('stream');
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+if (!process.browser && process.env.READABLE_STREAM === 'disable') {
+  module.exports = require('stream');
+}
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/transform.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/transform.js
@ -0,0 +1 @@
+module.exports = require("./lib/_stream_transform.js")
--- a/node_modules/gulp-concat-css/node_modules/readable-stream/writable.js
+++ b/node_modules/gulp-concat-css/node_modules/readable-stream/writable.js
@ -0,0 +1 @@
+module.exports = require("./lib/_stream_writable.js")
--- a/node_modules/gulp-concat-css/node_modules/string_decoder/.npmignore
+++ b/node_modules/gulp-concat-css/node_modules/string_decoder/.npmignore
@ -0,0 +1,2 @@
+build
+test
--- a/node_modules/gulp-concat-css/node_modules/string_decoder/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/string_decoder/LICENSE
@ -0,0 +1,20 @@
+Copyright Joyent, Inc. and other Node contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to permit
+persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/node_modules/gulp-concat-css/node_modules/string_decoder/README.md
+++ b/node_modules/gulp-concat-css/node_modules/string_decoder/README.md
@ -0,0 +1,7 @@
+**string_decoder.js** (`require('string_decoder')`) from Node.js core
+
+Copyright Joyent, Inc. and other Node contributors. See LICENCE file for details.
+
+Version numbers match the versions found in Node core, e.g. 0.10.24 matches Node 0.10.24, likewise 0.11.10 matches Node 0.11.10. **Prefer the stable version over the unstable.**
+
+The *build/* directory contains a build script that will scrape the source from the [joyent/node](https://github.com/joyent/node) repo given a specific Node version.
--- a/node_modules/gulp-concat-css/node_modules/string_decoder/index.js
+++ b/node_modules/gulp-concat-css/node_modules/string_decoder/index.js
@ -0,0 +1,221 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var Buffer = require('buffer').Buffer;
+
+var isBufferEncoding = Buffer.isEncoding
+  || function(encoding) {
+       switch (encoding && encoding.toLowerCase()) {
+         case 'hex': case 'utf8': case 'utf-8': case 'ascii': case 'binary': case 'base64': case 'ucs2': case 'ucs-2': case 'utf16le': case 'utf-16le': case 'raw': return true;
+         default: return false;
+       }
+     }
+
+
+function assertEncoding(encoding) {
+  if (encoding && !isBufferEncoding(encoding)) {
+    throw new Error('Unknown encoding: ' + encoding);
+  }
+}
+
+// StringDecoder provides an interface for efficiently splitting a series of
+// buffers into a series of JS strings without breaking apart multi-byte
+// characters. CESU-8 is handled as part of the UTF-8 encoding.
+//
+// @TODO Handling all encodings inside a single object makes it very difficult
+// to reason about this code, so it should be split up in the future.
+// @TODO There should be a utf8-strict encoding that rejects invalid UTF-8 code
+// points as used by CESU-8.
+var StringDecoder = exports.StringDecoder = function(encoding) {
+  this.encoding = (encoding || 'utf8').toLowerCase().replace(/[-_]/, '');
+  assertEncoding(encoding);
+  switch (this.encoding) {
+    case 'utf8':
+      // CESU-8 represents each of Surrogate Pair by 3-bytes
+      this.surrogateSize = 3;
+      break;
+    case 'ucs2':
+    case 'utf16le':
+      // UTF-16 represents each of Surrogate Pair by 2-bytes
+      this.surrogateSize = 2;
+      this.detectIncompleteChar = utf16DetectIncompleteChar;
+      break;
+    case 'base64':
+      // Base-64 stores 3 bytes in 4 chars, and pads the remainder.
+      this.surrogateSize = 3;
+      this.detectIncompleteChar = base64DetectIncompleteChar;
+      break;
+    default:
+      this.write = passThroughWrite;
+      return;
+  }
+
+  // Enough space to store all bytes of a single character. UTF-8 needs 4
+  // bytes, but CESU-8 may require up to 6 (3 bytes per surrogate).
+  this.charBuffer = new Buffer(6);
+  // Number of bytes received for the current incomplete multi-byte character.
+  this.charReceived = 0;
+  // Number of bytes expected for the current incomplete multi-byte character.
+  this.charLength = 0;
+};
+
+
+// write decodes the given buffer and returns it as JS string that is
+// guaranteed to not contain any partial multi-byte characters. Any partial
+// character found at the end of the buffer is buffered up, and will be
+// returned when calling write again with the remaining bytes.
+//
+// Note: Converting a Buffer containing an orphan surrogate to a String
+// currently works, but converting a String to a Buffer (via `new Buffer`, or
+// Buffer#write) will replace incomplete surrogates with the unicode
+// replacement character. See https://codereview.chromium.org/121173009/ .
+StringDecoder.prototype.write = function(buffer) {
+  var charStr = '';
+  // if our last write ended with an incomplete multibyte character
+  while (this.charLength) {
+    // determine how many remaining bytes this buffer has to offer for this char
+    var available = (buffer.length >= this.charLength - this.charReceived) ?
+        this.charLength - this.charReceived :
+        buffer.length;
+
+    // add the new bytes to the char buffer
+    buffer.copy(this.charBuffer, this.charReceived, 0, available);
+    this.charReceived += available;
+
+    if (this.charReceived < this.charLength) {
+      // still not enough chars in this buffer? wait for more ...
+      return '';
+    }
+
+    // remove bytes belonging to the current character from the buffer
+    buffer = buffer.slice(available, buffer.length);
+
+    // get the character that was split
+    charStr = this.charBuffer.slice(0, this.charLength).toString(this.encoding);
+
+    // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+    var charCode = charStr.charCodeAt(charStr.length - 1);
+    if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+      this.charLength += this.surrogateSize;
+      charStr = '';
+      continue;
+    }
+    this.charReceived = this.charLength = 0;
+
+    // if there are no more bytes in this buffer, just emit our char
+    if (buffer.length === 0) {
+      return charStr;
+    }
+    break;
+  }
+
+  // determine and set charLength / charReceived
+  this.detectIncompleteChar(buffer);
+
+  var end = buffer.length;
+  if (this.charLength) {
+    // buffer the incomplete character bytes we got
+    buffer.copy(this.charBuffer, 0, buffer.length - this.charReceived, end);
+    end -= this.charReceived;
+  }
+
+  charStr += buffer.toString(this.encoding, 0, end);
+
+  var end = charStr.length - 1;
+  var charCode = charStr.charCodeAt(end);
+  // CESU-8: lead surrogate (D800-DBFF) is also the incomplete character
+  if (charCode >= 0xD800 && charCode <= 0xDBFF) {
+    var size = this.surrogateSize;
+    this.charLength += size;
+    this.charReceived += size;
+    this.charBuffer.copy(this.charBuffer, size, 0, size);
+    buffer.copy(this.charBuffer, 0, 0, size);
+    return charStr.substring(0, end);
+  }
+
+  // or just emit the charStr
+  return charStr;
+};
+
+// detectIncompleteChar determines if there is an incomplete UTF-8 character at
+// the end of the given buffer. If so, it sets this.charLength to the byte
+// length that character, and sets this.charReceived to the number of bytes
+// that are available for this character.
+StringDecoder.prototype.detectIncompleteChar = function(buffer) {
+  // determine how many bytes we have to check at the end of this buffer
+  var i = (buffer.length >= 3) ? 3 : buffer.length;
+
+  // Figure out if one of the last i bytes of our buffer announces an
+  // incomplete char.
+  for (; i > 0; i--) {
+    var c = buffer[buffer.length - i];
+
+    // See http://en.wikipedia.org/wiki/UTF-8#Description
+
+    // 110XXXXX
+    if (i == 1 && c >> 5 == 0x06) {
+      this.charLength = 2;
+      break;
+    }
+
+    // 1110XXXX
+    if (i <= 2 && c >> 4 == 0x0E) {
+      this.charLength = 3;
+      break;
+    }
+
+    // 11110XXX
+    if (i <= 3 && c >> 3 == 0x1E) {
+      this.charLength = 4;
+      break;
+    }
+  }
+  this.charReceived = i;
+};
+
+StringDecoder.prototype.end = function(buffer) {
+  var res = '';
+  if (buffer && buffer.length)
+    res = this.write(buffer);
+
+  if (this.charReceived) {
+    var cr = this.charReceived;
+    var buf = this.charBuffer;
+    var enc = this.encoding;
+    res += buf.slice(0, cr).toString(enc);
+  }
+
+  return res;
+};
+
+function passThroughWrite(buffer) {
+  return buffer.toString(this.encoding);
+}
+
+function utf16DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 2;
+  this.charLength = this.charReceived ? 2 : 0;
+}
+
+function base64DetectIncompleteChar(buffer) {
+  this.charReceived = buffer.length % 3;
+  this.charLength = this.charReceived ? 3 : 0;
+}
--- a/node_modules/gulp-concat-css/node_modules/string_decoder/package.json
+++ b/node_modules/gulp-concat-css/node_modules/string_decoder/package.json
@ -0,0 +1,25 @@
+{
+  "name": "string_decoder",
+  "version": "0.10.31",
+  "description": "The string_decoder module from Node core",
+  "main": "index.js",
+  "dependencies": {},
+  "devDependencies": {
+    "tap": "~0.4.8"
+  },
+  "scripts": {
+    "test": "tap test/simple/*.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/rvagg/string_decoder.git"
+  },
+  "homepage": "https://github.com/rvagg/string_decoder",
+  "keywords": [
+    "string",
+    "decoder",
+    "browser",
+    "browserify"
+  ],
+  "license": "MIT"
+}
--- a/node_modules/gulp-concat-css/node_modules/through2/.npmignore
+++ b/node_modules/gulp-concat-css/node_modules/through2/.npmignore
@ -0,0 +1,3 @@
+test
+.jshintrc
+.travis.yml
--- a/node_modules/gulp-concat-css/node_modules/through2/LICENSE
+++ b/node_modules/gulp-concat-css/node_modules/through2/LICENSE
@ -0,0 +1,39 @@
+Copyright 2013, Rod Vagg (the "Original Author")
+All rights reserved.
+
+MIT +no-false-attribs License
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+Distributions of all or part of the Software intended to be used
+by the recipients as they would use the unmodified Software,
+containing modifications that substantially alter, remove, or
+disable functionality of the Software, outside of the documented
+configuration mechanisms provided by the Software, shall be
+modified such that the Original Author's bug reporting email
+addresses and urls are either replaced with the contact information
+of the parties responsible for the changes, or removed entirely.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+
+Except where noted, this license applies to any and all software
+programs and associated documentation files created by the
+Original Author, when distributed with the Software.
--- a/node_modules/gulp-concat-css/node_modules/through2/README.md
+++ b/node_modules/gulp-concat-css/node_modules/through2/README.md
@ -0,0 +1,142 @@
+# through2
+
+<!--
+
+soon ...
+
+[![Build Status](https://secure.travis-ci.org/rvagg/through2.png)](http://travis-ci.org/rvagg/through2)
+
+[![Build Status](https://saucelabs.com/browser-matrix/through2-sauce.svg)](https://travis-ci.org/rvagg/through2)
+
+-->
+
+[![NPM](https://nodei.co/npm/through2.png?compact=true)](https://nodei.co/npm/through2/)
+
+<!--
+not happy with these, we need to peg to readable-stream@1.0.x so it'll always report out-of-date
+
+[![david-dm](https://david-dm.org/rvagg/through2.png)](https://david-dm.org/rvagg/through2/)
+[![david-dm](https://david-dm.org/rvagg/through2/dev-status.png)](https://david-dm.org/rvagg/through2#info=devDependencies/)
+-->
+
+**A tiny wrapper around Node streams.Transform (Streams2) to avoid explicit subclassing noise**
+
+Inspired by [Dominic Tarr](https://github.com/dominictarr)'s [through](https://github.com/dominictarr/through) in that it's so much easier to make a stream out of a function than it is to set up the prototype chain properly: `through(function (chunk) { ... })`.
+
+Note: A **Streams3** version of through2 is available in npm with the tag `"1.0"` rather than `"latest"` so an `npm install through2` will get you the current Streams2 version (version number is 0.x.x). To use a Streams3 version use `npm install through2@1` to fetch the latest version 1.x.x. More information about Streams2 vs Streams3 and recommendations [here](http://www.nearform.com/nodecrunch/dont-use-nodes-core-stream-module).
+
+```js
+fs.createReadStream('ex.txt')
+  .pipe(through2(function (chunk, enc, callback) {
+
+    for (var i = 0; i < chunk.length; i++)
+      if (chunk[i] == 97)
+        chunk[i] = 122 // swap 'a' for 'z'
+
+    this.push(chunk)
+
+    callback()
+
+   }))
+  .pipe(fs.createWriteStream('out.txt'))
+```
+
+Or object streams:
+
+```js
+var all = []
+
+fs.createReadStream('data.csv')
+  .pipe(csv2())
+  .pipe(through2.obj(function (chunk, enc, callback) {
+
+    var data = {
+        name    : chunk[0]
+      , address : chunk[3]
+      , phone   : chunk[10]
+    }
+
+    this.push(data)
+
+    callback()
+
+  }))
+  .on('data', function (data) {
+    all.push(data)
+  })
+  .on('end', function () {
+    doSomethingSpecial(all)
+  })
+```
+
+Note that `through2.obj(fn)` is a convenience wrapper around `through2({ objectMode: true }, fn)`.
+
+## API
+
+<b><code>through2([ options, ] [ transformFunction ] [, flushFunction ])</code></b>
+
+Consult the **[stream.Transform](http://nodejs.org/docs/latest/api/stream.html#stream_class_stream_transform)** documentation for the exact rules of the `transformFunction` (i.e. `this._transform`) and the optional `flushFunction` (i.e. `this._flush`).
+
+### options
+
+The options argument is optional and is passed straight through to `stream.Transform`. So you can use `objectMode:true` if you are processing non-binary streams (or just use `through2.obj()`).
+
+The `options` argument is first, unlike standard convention, because if I'm passing in an anonymous function then I'd prefer for the options argument to not get lost at the end of the call:
+
+```js
+fs.createReadStream('/tmp/important.dat')
+  .pipe(through2({ objectMode: true, allowHalfOpen: false }, function (chunk, enc, cb) {
+
+    this.push(new Buffer('wut?'))
+    cb()
+
+  })
+  .pipe(fs.createWriteStream('/tmp/wut.txt'))
+```
+
+### transformFunction
+
+The `transformFunction` must have the following signature: `function (chunk, encoding, callback) {}`. A minimal implementation should call the `callback` function to indicate that the transformation is done, even if that transformation means discarding the chunk.
+
+To queue a new chunk, call `this.push(chunk)`&mdash;this can be called as many times as required before the `callback()` if you have multiple pieces to send on.
+
+Alternatively, you may use `callback(err, chunk)` as shorthand for emitting a single chunk or an error.
+
+If you **do not provide a `transformFunction`** then you will get a simple pass-through stream.
+
+### flushFunction
+
+The optional `flushFunction` is provided as the last argument (2nd or 3rd, depending on whether you've supplied options) is called just prior to the stream ending. Can be used to finish up any processing that may be in progress.
+
+<b><code>through2.ctor([ options, ] transformFunction[, flushFunction ])</code></b>
+
+Instead of returning a `stream.Transform` instance, `through2.ctor()` returns a **constructor** for a custom Transform. This is useful when you want to use the same transform logic in multiple instances.
+
+```js
+var FToC = through2.ctor({objectMode: true}, function (record, encoding, callback) {
+  if (record.temp != null && record.unit = "F") {
+    record.temp = ( ( record.temp - 32 ) * 5 ) / 9
+    record.unit = "C"
+  }
+  this.push(record)
+  callback()
+})
+
+// Create instances of FToC like so:
+var converter = new FToC()
+// Or:
+var converter = FToC()
+// Or specify/override options when you instantiate, if you prefer:
+var converter = FToC({objectMode: true})
+```
+
+## See Also
+
+  - [through2-map](https://github.com/brycebaril/through2-map) - Array.prototype.map analog for streams.
+  - [through2-filter](https://github.com/brycebaril/through2-filter) - Array.prototype.filter analog for streams.
+  - [through2-reduce](https://github.com/brycebaril/through2-reduce) - Array.prototype.reduce analog for streams.
+  - [through2-spy](https://github.com/brycebaril/through2-spy) - Wrapper for simple stream.PassThrough spies.
+
+## License
+
+**through2** is Copyright (c) 2013 Rod Vagg [@rvagg](https://twitter.com/rvagg) and licenced under the MIT licence. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE file for more details.
--- a/node_modules/gulp-concat-css/node_modules/through2/package.json
+++ b/node_modules/gulp-concat-css/node_modules/through2/package.json
@ -0,0 +1,34 @@
+{
+  "name": "through2",
+  "version": "1.1.1",
+  "description": "A tiny wrapper around Node streams2 Transform to avoid explicit subclassing noise",
+  "main": "through2.js",
+  "scripts": {
+    "test": "node test/test.js",
+    "test-local": "brtapsauce-local test/basic-test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rvagg/through2.git"
+  },
+  "keywords": [
+    "stream",
+    "streams2",
+    "through",
+    "transform"
+  ],
+  "author": "Rod Vagg <r@va.gg> (https://github.com/rvagg)",
+  "license": "MIT",
+  "dependencies": {
+    "readable-stream": ">=1.1.13-1 <1.2.0-0",
+    "xtend": ">=4.0.0 <4.1.0-0"
+  },
+  "devDependencies": {
+    "bl": ">=0.9.0 <0.10.0-0",
+    "stream-spigot": ">=3.0.4 <3.1.0-0",
+    "tape": ">=2.14.0 <2.15.0-0"
+  },
+  "publishConfig": {
+    "tag": "1.0"
+  }
+}
--- a/node_modules/gulp-concat-css/node_modules/through2/through2.js
+++ b/node_modules/gulp-concat-css/node_modules/through2/through2.js
@ -0,0 +1,96 @@
+var Transform = require('readable-stream/transform')
+  , inherits  = require('util').inherits
+  , xtend     = require('xtend')
+
+function DestroyableTransform(opts) {
+  Transform.call(this, opts)
+  this._destroyed = false
+}
+
+inherits(DestroyableTransform, Transform)
+
+DestroyableTransform.prototype.destroy = function(err) {
+  if (this._destroyed) return
+  this._destroyed = true
+  
+  var self = this
+  process.nextTick(function() {
+    if (err)
+      self.emit('error', err)
+    self.emit('close')
+  })
+}
+
+// a noop _transform function
+function noop (chunk, enc, callback) {
+  callback(null, chunk)
+}
+
+
+// create a new export function, used by both the main export and
+// the .ctor export, contains common logic for dealing with arguments
+function through2 (construct) {
+  return function (options, transform, flush) {
+    if (typeof options == 'function') {
+      flush     = transform
+      transform = options
+      options   = {}
+    }
+
+    if (typeof transform != 'function')
+      transform = noop
+
+    if (typeof flush != 'function')
+      flush = null
+
+    return construct(options, transform, flush)
+  }
+}
+
+
+// main export, just make me a transform stream!
+module.exports = through2(function (options, transform, flush) {
+  var t2 = new DestroyableTransform(options)
+
+  t2._transform = transform
+
+  if (flush)
+    t2._flush = flush
+
+  return t2
+})
+
+
+// make me a reusable prototype that I can `new`, or implicitly `new`
+// with a constructor call
+module.exports.ctor = through2(function (options, transform, flush) {
+  function Through2 (override) {
+    if (!(this instanceof Through2))
+      return new Through2(override)
+
+    this.options = xtend(options, override)
+
+    DestroyableTransform.call(this, this.options)
+  }
+
+  inherits(Through2, DestroyableTransform)
+
+  Through2.prototype._transform = transform
+
+  if (flush)
+    Through2.prototype._flush = flush
+
+  return Through2
+})
+
+
+module.exports.obj = through2(function (options, transform, flush) {
+  var t2 = new DestroyableTransform(xtend({ objectMode: true, highWaterMark: 16 }, options))
+
+  t2._transform = transform
+
+  if (flush)
+    t2._flush = flush
+
+  return t2
+})
--- a/node_modules/gulp-concat-css/package.json
+++ b/node_modules/gulp-concat-css/package.json
@ -0,0 +1,47 @@
+{
+  "name": "gulp-concat-css",
+  "description": "Concatenate css files, rebasing urls and inlining @import",
+  "version": "3.1.0",
+  "homepage": "https://github.com/mariocasciaro/gulp-concat-css",
+  "author": {
+    "name": "Mario Casciaro"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/mariocasciaro/gulp-concat-css"
+  },
+  "bugs": {
+    "url": "https://github.com/mariocasciaro/gulp-concat-css/issues"
+  },
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "https://github.com/mariocasciaro/gulp-concat-css/blob/master/LICENSE"
+    }
+  ],
+  "dependencies": {
+    "lodash.defaults": "^3.0.0",
+    "parse-import": "^2.0.0",
+    "plugin-error": "^0.1.2",
+    "rework": "~1.0.0",
+    "rework-import": "^2.0.0",
+    "rework-plugin-url": "^1.0.1",
+    "through2": "~1.1.1",
+    "vinyl": "^2.1.0"
+  },
+  "devDependencies": {
+    "chai": "^1.10.0",
+    "mocha": "^2.1.0"
+  },
+  "scripts": {
+    "test": "node_modules/mocha/bin/mocha test/*.js --reporter spec"
+  },
+  "keywords": [
+    "gulpplugin",
+    "concat",
+    "css",
+    "import",
+    "merge",
+    "inline"
+  ]
+}
--- a/node_modules/gulp-concat-css/test/expected/build/bundle-all.css
+++ b/node_modules/gulp-concat-css/test/expected/build/bundle-all.css
@ -0,0 +1,36 @@
+@import url(http://fonts.googleapis.com/css);
+@import url("//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700,400italic");
+@font-face {
+  font-family: 'Font';
+  src: url("../lib/fonts/webfont.eot");
+}
+
+.navbar-header-2 {
+  clear: both;
+}
+
+.navbar-header:after {
+  clear: both;
+  background: url("data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/") no-repeat left center;
+}
+
+@media (min-width: 768px) {
+  .navbar-header {
+    background: url("data:image/png;base64,iVBORwJggg==") no-repeat scroll 100% 50% rgba(0, 0, 0, 0);
+    float: left;
+  }
+}
+
+@font-face {
+  font-family: 'Font';
+  src: url("../lib/fonts/webfont.eot?v=4.0.0");
+  src: url("../lib/fonts/webfont.eot");
+}
+@font-face {
+  font-family: 'Font1';
+  src: url("../lib/fonts/webfont.eot");
+}
+
+.navbar-header {
+  clear: both;
+}
--- a/node_modules/gulp-concat-css/test/expected/build/bundle-bubbleonly.css
+++ b/node_modules/gulp-concat-css/test/expected/build/bundle-bubbleonly.css
@ -0,0 +1,15 @@
+@import url('subdir/imported.css');
+@import url("//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700,400italic");
+@font-face {
+  font-family: 'Font';
+  src: url('lib/fonts/webfont.eot?v=4.0.0');
+  src: url('lib/fonts/webfont.eot');
+}
+@font-face {
+  font-family: 'Font1';
+  src: url('../lib/fonts/webfont.eot');
+}
+
+.navbar-header {
+  clear: both;
+}
--- a/node_modules/gulp-concat-css/test/expected/build/bundle-import.css
+++ b/node_modules/gulp-concat-css/test/expected/build/bundle-import.css
@ -0,0 +1,36 @@
+@import url(http://fonts.googleapis.com/css);
+@import url("//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700,400italic");
+@font-face {
+  font-family: 'Font';
+  src: url('../lib/fonts/webfont.eot');
+}
+
+.navbar-header-2 {
+  clear: both;
+}
+
+.navbar-header:after {
+  clear: both;
+  background: url(data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/) no-repeat left center;
+}
+
+@media (min-width: 768px) {
+  .navbar-header {
+    background: url('data:image/png;base64,iVBORwJggg==') no-repeat scroll 100% 50% rgba(0, 0, 0, 0);
+    float: left;
+  }
+}
+
+@font-face {
+  font-family: 'Font';
+  src: url('lib/fonts/webfont.eot?v=4.0.0');
+  src: url('lib/fonts/webfont.eot');
+}
+@font-face {
+  font-family: 'Font1';
+  src: url('../lib/fonts/webfont.eot');
+}
+
+.navbar-header {
+  clear: both;
+}
--- a/node_modules/gulp-concat-css/test/expected/build/bundle-rebase.css
+++ b/node_modules/gulp-concat-css/test/expected/build/bundle-rebase.css
@ -0,0 +1,15 @@
+@import url('subdir/imported.css');
+@import url("//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700,400italic");
+@font-face {
+  font-family: 'Font';
+  src: url("../lib/fonts/webfont.eot?v=4.0.0");
+  src: url("../lib/fonts/webfont.eot");
+}
+@font-face {
+  font-family: 'Font1';
+  src: url("../lib/fonts/webfont.eot");
+}
+
+.navbar-header {
+  clear: both;
+}
--- a/node_modules/gulp-concat-css/test/fixtures/main.css
+++ b/node_modules/gulp-concat-css/test/fixtures/main.css
@ -0,0 +1,7 @@
+@import url('subdir/imported.css');
+
+@font-face {
+    font-family: 'Font';
+    src: url('lib/fonts/webfont.eot?v=4.0.0');
+    src: url('lib/fonts/webfont.eot');
+}
--- a/node_modules/gulp-concat-css/test/fixtures/subdir/imported.css
+++ b/node_modules/gulp-concat-css/test/fixtures/subdir/imported.css
@ -0,0 +1,17 @@
+@font-face {
+    font-family: 'Font';
+    src: url('../lib/fonts/webfont.eot');
+}
+
+@import url("../vendor/importedRecursive.css");
+
+.navbar-header:after {
+    clear: both;
+    background: url(data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/) no-repeat left center;
+}
+@media (min-width: 768px) {
+    .navbar-header {
+      background: url('data:image/png;base64,iVBORwJggg==') no-repeat scroll 100% 50% rgba(0, 0, 0, 0);
+      float: left;
+    }
+}
--- a/node_modules/gulp-concat-css/test/fixtures/vendor/importedRecursive.css
+++ b/node_modules/gulp-concat-css/test/fixtures/vendor/importedRecursive.css
@ -0,0 +1,5 @@
+@import url(http://fonts.googleapis.com/css);
+
+.navbar-header-2 {
+    clear: both;
+}
--- a/node_modules/gulp-concat-css/test/fixtures/vendor/vendor.css
+++ b/node_modules/gulp-concat-css/test/fixtures/vendor/vendor.css
@ -0,0 +1,11 @@
+@import url("//fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,700,400italic");
+
+@font-face {
+  font-family: 'Font1';
+  src: url('../lib/fonts/webfont.eot');
+}
+
+
+.navbar-header {
+    clear: both;
+}
--- a/node_modules/gulp-concat-css/test/test.js
+++ b/node_modules/gulp-concat-css/test/test.js
@ -0,0 +1,130 @@
+var expect = require('chai').expect,
+  through = require('through2'),
+  Vinyl = require('vinyl'),
+  fs = require('fs'),
+  path = require('path'),
+  concatCss = require('../');
+
+
+function expected(file) {
+  var base = path.join(process.cwd(), 'test/expected');
+  var filepath = path.resolve(base, file);
+  return new Vinyl({
+    path: filepath,
+    cwd: process.cwd(),
+    base: base,
+    contents: fs.readFileSync(filepath)
+  });
+}
+
+function fixture(file) {
+  var base = path.join(process.cwd(), 'test/fixtures');
+  var filepath = path.join(base, file);
+  return new Vinyl({
+    path: filepath,
+    cwd: process.cwd(),
+    base: base,
+    contents: fs.readFileSync(filepath)
+  });
+}
+
+describe('gulp-concat-css', function() {
+  it('should only bubble up imports', function(done) {
+    var now = Date.now();
+    var stream = concatCss('build/bundle-bubbleonly.css', {inlineImports: false, rebaseUrls: false});
+    var expectedFile = expected('build/bundle-bubbleonly.css');
+    stream
+      .pipe(through.obj(function(file, enc, cb) {
+        //fs.writeFileSync("bundle.css", file.contents);
+
+        expect(String(file.contents)).to.be.equal(String(expectedFile.contents));
+        expect(path.basename(file.path)).to.be.equal(path.basename(expectedFile.path));
+        expect(file.cwd, "cwd").to.be.equal(expectedFile.cwd);
+        expect(file.relative, "relative").to.be.equal(expectedFile.relative);
+        console.log('Execution time: ' + (Date.now() - now) + 'ms');
+        done();
+      }));
+
+    stream.write(fixture('main.css'));
+    stream.write(fixture('vendor/vendor.css'));
+    stream.end();
+  });
+
+  it('should only rebase urls', function(done) {
+    var now = Date.now();
+    var stream = concatCss('build/bundle-rebase.css', {inlineImports: false});
+    var expectedFile = expected('build/bundle-rebase.css');
+    stream
+      .pipe(through.obj(function(file, enc, cb) {
+        //fs.writeFileSync("bundle.css", file.contents);
+
+        expect(String(file.contents)).to.be.equal(String(expectedFile.contents));
+        expect(path.basename(file.path)).to.be.equal(path.basename(expectedFile.path));
+        expect(file.cwd, "cwd").to.be.equal(expectedFile.cwd);
+        expect(file.relative, "relative").to.be.equal(expectedFile.relative);
+        console.log('Execution time: ' + (Date.now() - now) + 'ms');
+        done();
+      }));
+
+    stream.write(fixture('main.css'));
+    stream.write(fixture('vendor/vendor.css'));
+    stream.end();
+  });
+
+
+  it('should only inline imports', function(done) {
+    var now = Date.now();
+    var stream = concatCss('build/bundle-import.css', {inlineImports: true, rebaseUrls: false});
+    var expectedFile = expected('build/bundle-import.css');
+    stream
+      .pipe(through.obj(function(file, enc, cb) {
+        //fs.writeFileSync("bundle.css", file.contents);
+
+        expect(String(file.contents)).to.be.equal(String(expectedFile.contents));
+        expect(path.basename(file.path)).to.be.equal(path.basename(expectedFile.path));
+        expect(file.cwd, "cwd").to.be.equal(expectedFile.cwd);
+        expect(file.relative, "relative").to.be.equal(expectedFile.relative);
+        console.log('Execution time: ' + (Date.now() - now) + 'ms');
+        done();
+      }));
+
+    stream.write(fixture('main.css'));
+    stream.write(fixture('vendor/vendor.css'));
+    stream.end();
+  });
+
+  it('should concat, rebase urls, inline imports and bubble up external imports', function(done) {
+    var now = Date.now();
+    var stream = concatCss('build/bundle-all.css');
+    var expectedFile = expected('build/bundle-all.css');
+    stream
+      .pipe(through.obj(function(file, enc, cb) {
+        //fs.writeFileSync("bundle.css", file.contents);
+        expect(String(file.contents)).to.be.equal(String(expectedFile.contents));
+        expect(path.basename(file.path)).to.be.equal(path.basename(expectedFile.path));
+        expect(file.cwd, "cwd").to.be.equal(expectedFile.cwd);
+        expect(file.relative, "relative").to.be.equal(expectedFile.relative);
+        console.log('Execution time: ' + (Date.now() - now) + 'ms');
+        done();
+      }));
+
+    stream.write(fixture('main.css'));
+    stream.write(fixture('vendor/vendor.css'));
+    stream.end();
+  });
+
+  it('should not crash if no file is provided', function(done) {
+    var stream = concatCss('build/bundle-all.css');
+    stream
+      .on('error', function() {
+        done(false);
+      })
+      .pipe(through.obj(function(file, enc, cb) {
+        done(false);
+      }, function() {
+        done();
+      }));
+
+    stream.end();
+  });
+});
				`@ -0,0 +1 @@`
				`module.exports = require("./lib/_stream_duplex.js")`