optimize gui reader
Merge branch 'master' into master_nutty_modify_version
optimize layout
remove useless codes
Modify "setLayoutParameter" method
Merge pull request #3927 from nutty898/master_nutty_optimizelayout

Master nutty optimizelayout
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x
fixed #2887 fix Dragon.xml