fix child armature setSpeedScale issue;
Merge pull request #2132 from dingpinglv/Iss5811_ArmatureShader

Fixed #5811: cc.Armature supports setting shader program
Merge pull request #2128 from mutoo/develop

fix child armature setSpeedScale issue;
Issue #2107: LoadingBar setPercent is invalid.
1. setPercent is invalid when _scale9Enabled is true.
2. setPercent is invalid when setContentSize after setPercent
Merge pull request #2133 from VisualSJ/#2107-loadingbar

Fixed #2107: LoadingBar setPercent is invalid.
Fixed a bug of Armature reader that its isTween is incorrect.
Merge branch 'develop' of git://github.com/cocos2d/cocos2d-html5 into Iss5811_ArmatureShader