Fixed #5556: Make FadeIn support only duration as parameter
This action should always animate node's opacity to 255
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop
Merge pull request #1922 from pandamicro/develop

Fixed #5556: Make FadeIn support only duration as parameter
Temporary removal of assert
Merge pull request #1926 from VisualSJ/develop-123

Temporary removal of assert
Follow up the code - #5501
fixed: one-loop CCArmatureAnimation can't finish when setSpeedScale is less than 1.0;
fixed: an obvious layout bug;
Merge pull request #1929 from mutoo/develop

fixed some bugs.
add render
Follow up the code - #5614
Follow up the code - #5614
Follow up the code - #5668
Closed #3546: Added bake function to cc.Layer
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss3646_BakeNode
Closed #3646: modify cc.Layer to avoid the normal layer when it doesn't use bake function.
Fixed #5576: Calcul cc.visibleRect with visible rect of cc.view
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop
Fixed #5577: Position children with cc.visibleRect
Merge pull request #1931 from dingpinglv/Iss3646_BakeNode

Closed #3546: Added bake function to cc.Layer