Follow-up to #52.

- Animate skip button during lead in.
- Update flashlight radius during lead in.
- Check if keys are set before calling gameKeyPressed().
- Deleted mouse moved/dragged events (no longer used).
- Renamed updateGameKeyPress().
- Added "auto"/"relax" mod checks to gameKeyPressed().

Also fixed a bug where the MenuButton class wasn't properly resetting image alpha/rotation in certain cases.

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

src/itdelatrisu/opsu/objects/Circle.java

@@ -23,7 +23,6 @@ import itdelatrisu.opsu.GameImage;
 import itdelatrisu.opsu.GameMod;
 import itdelatrisu.opsu.OsuHitObject;
 import itdelatrisu.opsu.Utils;
-import itdelatrisu.opsu.audio.MusicController;
 import itdelatrisu.opsu.states.Game;
 
 import org.newdawn.slick.Color;