Add a version update checker and NewVersionBar to show on the UI.

src/components/views/globals/NewVersionBar.js

@@ -0,0 +1,36 @@
+/*
+Copyright 2015, 2016 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.
+*/
+
+'use strict';
+
+var React = require('react');
+var sdk = require('matrix-react-sdk')
+
+module.exports = React.createClass({
+    displayName: 'NewVersionBar',
+
+    render: function() {
+        return (
+            <div className="mx_MatrixToolbar">
+                <img className="mx_MatrixToolbar_warning" src="img/warning.svg" width="24" height="23" alt="/!\"/>
+                <div>
+                    A new version of Vector is available. Refresh your browser.
+                </div>
+            </div>
+        );
+    }
+});
+