Interrupt OsuParser by pressing 'ESC' in Splash state.

Allows parsing only a subset of OsuFiles, in case parsing takes too long.

Other changes:
- Press 'ESC' three times to exit from the Splash state.
- Override Container.exit().
- Reset MusicController in closeRequested() to prevent an OpenAL error.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/states/MainMenu.java

@@ -397,11 +397,8 @@ public class MainMenu extends BasicGameState {
 			if (logo.contains(x, y) || playButton.contains(x, y)) {
 				SoundController.playSound(SoundEffect.MENUHIT);
 				game.enterState(Opsu.STATE_SONGMENU, new FadeOutTransition(Color.black), new FadeInTransition(Color.black));
-			} else if (exitButton.contains(x, y)) {
-				Options.saveOptions();
-				Opsu.closeSocket();
+			} else if (exitButton.contains(x, y))
 				container.exit();
-			}
 		}
 	}