issue #1803:handle onExit event to release resources
issue #1803:add SpriteOffsetAnchorSkewScale
issue #1803:add SpriteOffsetAnchorRotationalSkewScale
issue #1803:add SpriteBatchNodeOffsetAnchorSkewScale
issue #1803:add SpriteBatchNodeOffsetAnchorRotationalSkewScale
issue #1803:add SpriteOffsetAnchorFlip
Merge https://github.com/cocos2d/cocos2d-x into iss1803-spritetest-lua
Merge pull request #2163 from minggo/iss1803-spritetest-lua

add some lua test cases