Added command parameter to prevent update

"--without-update"
Fixes #647

app/Application.js

@@ -34,7 +34,7 @@ Ext.define('Rambox.Application', {
 		Rambox.ux.Auth0.init();
 
 		// Check for updates
-		Rambox.app.checkUpdate(true);
+		if ( require('electron').remote.process.argv.indexOf('--without-update') === -1 ) Rambox.app.checkUpdate(true);
 
 		// Add shortcuts to switch services using CTRL + Number
 		var map = new Ext.util.KeyMap({

electron/main.js

@@ -156,7 +156,7 @@ function createWindow () {
 
 	tray.create(mainWindow, config);
 
-	if ( fs.existsSync(path.resolve(path.dirname(process.execPath), '..', 'Update.exe')) ) updater.initialize(mainWindow);
+	if ( fs.existsSync(path.resolve(path.dirname(process.execPath), '..', 'Update.exe')) && process.argv.indexOf('--without-update') === -1 ) updater.initialize(mainWindow);
 
 	// Open links in default browser
 	mainWindow.webContents.on('new-window', function(e, url, frameName, disposition, options) {