Better memory management

src/main.js

@@ -36,7 +36,7 @@ app.on('ready', function () {
 	mainWindow.loadUrl('file://' + __dirname + '/index.html');
 	mainWindow.toggleDevTools();
 	mainWindow.on('closed', function() {
-		mainWindow = undefined;
+		delete mainWindow;
 		audioController.close();
 	});
 
@@ -47,14 +47,16 @@ app.on('ready', function () {
 		frame: false
 	});
 	audioController.loadUrl('file://' + __dirname + '/audio.html');
-	audioController.on('closed', function () { audioController = undefined; });
+	audioController.on('closed', function () { delete audioController; });
 });
 
 ipc.on('hide', function () {
 	mainWindow.hide();
+	mainWindow.loadUrl('');
 });
 
 ipc.on('show', function () {
+	mainWindow.loadUrl('file://' + __dirname + '/index.html');
 	mainWindow.show();
 });