fix tween effect
fix reading CCSpriteFrame crash
1.Add removeDisplay method
2.Add Armature Nesting Test 2
3.Remove unused code in CCDisplayFactory.cpp
upload resource
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x
fixed #2887 fix Dragon.xml
update Armature Nesting Test 2
Merge pull request #3944 from 2youyouo2/master

update armature