Merge pull request #333 from gena-m/master

restore CCSpriteFrameCache compatibility
removing the upsell
Fix for issue 42 - added helper constructor signatures to ease in the creation of animations and sprite sheets.
Merge pull request #334 from Cocos2DXNA/ISSUE_42

#42 - Helper ctors to make animations and sprite sheets easier.
fix for misalined index storage of layers in the multiplexer. The in order list was always recording an index that was +1 of the actual index of the added layer.
Fix for issue reported in comments on commit 9340705.
initialize with opacity = 1
initialize with opacity = 255
thread safe
fixed Issue #317
Store name without extension
CCTextureCache.AddImageAsync and test
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna