logout button on splashscreen to avoid wedging users whose server has gone awol

src/skins/vector/css/pages/MatrixChat.css

@@ -14,6 +14,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+.mx_MatrixChat_splash {
+    position: relative;
+    height: 100%;
+}
+
+.mx_MatrixChat_splashButtons {
+    text-align: center;
+    width: 100%;
+    position: absolute;
+    bottom: 30px;
+}
+
 .mx_MatrixChat_wrapper {
     display: -webkit-box;
     display: -moz-box;

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

@@ -61,6 +61,14 @@ module.exports = React.createClass({
         });
     },
 
+    onLogoutClick: function(event) {
+        dis.dispatch({
+            action: 'logout'
+        });
+        event.stopPropagation();
+        event.preventDefault();
+    },
+
     handleResize: function(e) {
         var hideLhsThreshold = 1000;
         var showLhsThreshold = 1000;
@@ -157,7 +165,10 @@ module.exports = React.createClass({
         } else if (this.state.logged_in) {
             var Spinner = sdk.getComponent('atoms.Spinner');
             return (
-                <Spinner />
+                <div className="mx_MatrixChat_splash">
+                    <Spinner />
+                    <a href="#" className="mx_MatrixChat_splashButtons" onClick={ this.onLogoutClick }>Logout</a>
+                </div>
             );
         } else if (this.state.screen == 'register') {
             return (