GameLayer.m
- MAX_GAME_SPEED increase
- Changed how gameOver layer is called
- Made resetHighScore public

MainMenuScoreBox
- Call resetHighScore when the reset button is pushed.

Multiplier
- [self decrementMultiplier:-1];

- Change how reset is called so that it also resets the local high score.

Signed-off-by: Chris Zukowski <iamchriszukowski@yahoo.com>
Merge remote-tracking branch 'zukalous/highScoreGOLayer' into rotato_master

Conflicts:
	sources/GameLayer.h
	sources/MainMenuScoreBox.m

Signed-off-by: Matt Cleveland <mgcleveland@gmail.com>