fixed no effect with stopping tween between two frames
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
change tab to 4 space
change tab to 4 space
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/2youyouo2/cocos2d-x into v3

Conflicts:
	external
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge pull request #6734 from 2youyouo2/v3

fixed no effect with stopping tween between two frames