Add production dependencies

node_modules/external-editor/example_async.js

@@ -0,0 +1,40 @@
+var ExternalEditor = require('./main').ExternalEditor;
+var readline = require('readline');
+
+var rl = readline.createInterface({
+  input: process.stdin,
+  output: null
+});
+
+var message = '\n\n# Please Write a message\n# Any line starting with # is ignored';
+
+process.stdout.write('Please write a message. (press enter to launch your preferred editor)');
+
+editor = new ExternalEditor(message);
+
+rl.on('line', function () {
+  try {
+    rl.pause();
+    editor.runAsync(function (error, response)
+    {
+      if (error) {
+        process.stdout.write(error.message);
+        process.exit(1);
+      }
+      if (response.length === 0) {
+        readline.moveCursor(process.stdout, 0, -1);
+        process.stdout.write('Your message was empty, please try again. (press enter to launch your preferred editor)');
+        rl.resume();
+      } else {
+        process.stdout.write('Your Message:\n');
+        process.stdout.write(response);
+        process.stdout.write('\n');
+        rl.close();
+      }
+    });
+  } catch (err) {
+    process.stderr.write(err.message);
+    process.stdout.write('\n');
+    rl.close();
+  }
+});