optimize button
Merge branch 'master' into master_nutty_modify_framework_optimizewidgets
Merge pull request #4823 from Dhilan007/master_222

fix black screen in testlua
Invoke the “onEnter” function by the other way
Merge branch 'master' into master_nutty_modify_framework_optimizewidgets
Merge pull request #4827 from samuele3hu/masterFix

Invoke the “onEnter” function by the other way
Modify renderers draw order define.
Merge branch 'master' into master_nutty_modify_framework_optimizewidgets
Merge pull request #4818 from nutty898/master_nutty_modify_framework_optimizewidgets

optimize button
Merge branch 'master' of git://github.com/cocos2d/cocos2d-x
fix compiling error on android.