Support for get_app_version

src/vector/platform/ElectronPlatform.js

@@ -19,6 +19,7 @@ limitations under the License.
 
 import VectorBasePlatform from './VectorBasePlatform';
 import dis from 'matrix-react-sdk/lib/dispatcher';
+import q from 'q';
 
 const electron = require('electron');
 const remote = electron.remote;
@@ -84,6 +85,10 @@ export default class ElectronPlatform extends VectorBasePlatform {
         notif.close();
     }
 
+    getAppVersion() {
+        return q(electron.remote.app.getVersion());
+    }
+
     pollForUpdate() {
         // In electron we control the update process ourselves, since
         // it needs to run in the main process, so we just run the timer