switch initial spinner to mx_Spinner

src/skins/vector/css/atoms/Spinner.css

@@ -0,0 +1,25 @@
+/*
+Copyright 2015 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_Spinner {
+    display: -webkit-flex;
+    display: flex;
+    -webkit-align-items: center;
+    -webkit-justify-content: center;
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+}

src/skins/vector/views/atoms/Spinner.js

@@ -26,7 +26,7 @@ module.exports = React.createClass({
         var h = this.props.h || 32;
         var imgClass = this.props.imgClassName || "";
         return (
-            <div>
+            <div className="mx_Spinner">
                 <img src="img/spinner.gif" width={w} height={h} className={imgClass}/>
             </div>
         );

src/skins/vector/views/pages/MatrixChat.js

@@ -23,9 +23,6 @@ var sdk = require('matrix-react-sdk')
 
 var MatrixChatController = require('matrix-react-sdk/lib/controllers/pages/MatrixChat')
 
-// should be atomised
-var Loader = require("react-loader");
-
 var dis = require('matrix-react-sdk/lib/dispatcher');
 var Matrix = require("matrix-js-sdk");
 var ContextualMenu = require("../../../../ContextualMenu");
@@ -156,8 +153,9 @@ var MatrixChat = React.createClass({
                 );
             }
         } else if (this.state.logged_in) {
+            var Spinner = sdk.getComponent('atoms.Spinner');
             return (
-                <Loader />
+                <Spinner />
             );
         } else if (this.state.screen == 'register') {
             return (