Added configurable game key bindings.

- Game keys (default Z/X) can be changed to any letter or digit in the options screen.

Other changes:
- Mouse/keyboard input in the "Game Paused Menu" state is now the same as in the game state (i.e. all game keys available).
- Moved 'isInputKeyPressed()' into "Utils" class ("Game" state didn't even call it).
- Trimmed 'failsound.wav'.

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

src/itdelatrisu/opsu/objects/Spinner.java

@@ -47,11 +47,6 @@ public class Spinner {
 	 */
 	private OsuHitObject hitObject;
 
-	/**
-	 * The associated Game object.
-	 */
-	private Game game;
-
 	/**
 	 * The associated GameScore object.
 	 */
@@ -95,7 +90,6 @@ public class Spinner {
 	 */
 	public Spinner(OsuHitObject hitObject, Game game, GameScore score) {
 		this.hitObject = hitObject;
-		this.game = game;
 		this.score = score;
 
 		// calculate rotations needed
@@ -202,7 +196,7 @@ public class Spinner {
 		}
 
 		// not spinning: nothing to do
-		if (!game.isInputKeyPressed()) {
+		if (!Utils.isGameKeyPressed()) {
 			lastAngle = -1f;
 			return false;
 		}