Reshuffle to put "HTML" (JSX) and CSS together as a theme with logic elsewhere.

themes/base/views/molecules/MessageComposer.js

@@ -0,0 +1,17 @@
+var React = require('react');
+
+var MessageComposerController = require("../../../../src/controllers/molecules/MessageComposer");
+
+module.exports = React.createClass({
+    displayName: 'MessageComposer',
+    mixins: [MessageComposerController],
+
+    render: function() {
+        return (
+            <div className="mx_MessageComposer">
+                <textarea ref="textarea" onKeyDown={this.onKeyDown} />
+            </div>
+        );
+    },
+});
+