Mac spritesheet fix #1096

I used phone/phonehd as they look right and are closest to actual
resolutions used.
Quickly fixed #1053
Fixed cclabelttf crash for ios 6.0 devices.
Changed the CCLabelTTF fallback check, so it makes more sense.
Merge branch 'fontfix' of https://github.com/osinoleg/cocos2d-iphone into develop

Conflicts:
	cocos2d/CCLabelTTF.m
Merge branch 'develop' of https://github.com/thayerandrews/cocos2d-iphone into develop
Merge pull request #1097 from cocojoe/bug/1096

Mac spritesheet fix, Missing mac files