Achievements infrastructure finished and most achievements
coded up.

Signed-off-by: Matt Cleveland <mgcleveland@gmail.com>
Finalize Game Center support

Signed-off-by: Hin Lam <max21226@Hin-Lams-iMac.local>
Achievements branch with GameCenter branch merged in.
Unable to compile this branch.

Merge branch 'finish_achievements' into show_to_hin

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

Signed-off-by: Matt Cleveland <mgcleveland@gmail.com>
Updated metadatafiles to get GameCenter merge compiling.

Fixed on other thing.

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