Added some tween support for CocoStudio UI.
Note that, Custom, Quad, Cubic, Quart, Quint, and Circ ease type is not supported yet.
Added place holders for Custom type
fixed a bug which bounce frame ease type called a wrong api
fixed the elastic api call
Issue #5410: Creating new actions
Merge pull request #1882 from VisualSJ/develop-action

Issue #5410: Creating new actions
Merge branch 'develop' of https://github.com/f15gdsy/cocos2d-html5 into develop-action
Closed #5375: fixed a bug of cc._audioLoader that it doesn't work when a audio file loads fail.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss5375_AudioLoader
Merge pull request #1883 from dingpinglv/Iss5375_AudioLoader

Closed #5375: fixed a bug of cc._audioLoader that it doesn't work when a audio file loads fail.
Closed #5412: Fixed keyboard events loss
Merge pull request #1884 from VisualSJ/develop-events

Closed #5412: Fixed keyboard events loss
Closed #5413: Enhanced cc.log function
Merge pull request #1885 from VisualSJ/develop-events

Closed #5413: Enhanced cc.log function
Closed #5414: multiple property object supports in extend function
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into iss5414_MultipleExtend
Merge and Modification from @f15gdsy
Merge pull request #1886 from dingpinglv/iss5414_MultipleExtend

Closed #5414: multiple property object supports in extend function
Add getAction default data
Merge pull request #1887 from VisualSJ/develop-action

Merge and Modification from @f15gdsy