Make cc.async.waterfall similar to async.waterfall of async.js.
Fixed #5927: fixed a mistake of ccs.LabelAtlasReader
Merge pull request #2258 from dingpinglv/Iss5927_GUIReader

Fixed #5927: fixed a mistake of ccs.LabelAtlasReader
Fixed #5927: fixed a mistake of ccs.GUIReader
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into Iss5927_GUIReader
Merge pull request #2259 from dingpinglv/Iss5927_GUIReader

Fixed #5927: fixed a mistake of ccs.GUIReader
Merge pull request #2256 from SmallAiTT/cc_async_waterfall

Make cc.async.waterfall similar to async.waterfall of async.js.
Fixed #2260: _removeByComponent method have bad "if"
Issue #5935: Support timeline
Issue #5936: Scale9Sprite - Effect of canvas and webgl mode is not the same
Merge pull request #2262 from VisualSJ/5936-Scale9Sprite

Issue #5936: Scale9Sprite - Effect of canvas and webgl mode is not the s...
Merge pull request #2261 from dingpinglv/Iss2260_removeByComponent

Fixed #2260: _removeByComponent method have bad "if"
Issue #5937: LabelTTF support shadow color
Issue #5938: Add getTitleRenderer to UIButton
Merge pull request #2264 from VisualSJ/5938-UIButton

Issue #5938: Add getTitleRenderer to UIButton
Merge pull request #2263 from VisualSJ/5937-labelttf

Issue #5937: LabelTTF support shadow color
Issue #5935: Support timeline
Merge pull request #2265 from VisualSJ/develop-cocostudio

Issue #5935: Support timeline
Issue #5939: LabelAtlas._cascadeOpacityEnabled is false
Merge pull request #2266 from VisualSJ/5939

Issue #5939: LabelAtlas._cascadeOpacityEnabled is false