cocos2d/cocos2d-iphone — pull request #863 by thayerandrews (2014-07-01 17:39:05+00:00)
Title: CCEffectRefraction and other small CCEffect changes

- Adds first pass at CCEffectRefraction
- Adds refraction test to CCEffectsTest
- Adds node to texture transform to CCSprite in support of CCEffectRefraction
- Fixes node to world transform for CCRenderTextureSprite in support of CCEffectRefraction
- Makes CCEffectStack immutable by removing addEffect / removeEffect interface
- Misc API cleanup for other effects