Free-D Version 3.1

Added: CountDownTimer, component for student work.
Updated: ButtonManager, return null if it is not in the scene
Updated: Effects Manager, Added Comments to aid in reading
Updated: Game Manager, checker for ButtonManager&& Comments to aid in
reading,
Updated: NoteSequence, added TODO: for student work
Updated: NoteManager, added comments to aid in reading;
Updated PlayerController, added comments to aid in reading;
Updated: PlayerMovement, added comments to aid in reading && macro for
OSX editor and OSX player
Updated: SoundManager, added comments to aid in reading;