Merge pull request #1873 from VisualSJ/develop-5-22

Removed setColor judgment transparency
Fixed #5325: the getXXXColor of cc.NodeRGBA and UILayout shall return a new color object.
Merge pull request #1874 from dingpinglv/Iss5325_ReturnsNewColor

Fixed #5325: the getXXXColor of cc.NodeRGBA and UILayout shall return a new color object.
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into develop-5-22