[Win32] undef MessageBox since it will be conflicted with cocos2d::MessageBox.
Adding COCOS2D_DEBUG=1 for liblua project. Adding missing files in liblua project.
Merge pull request #2964 from dumganhar/develop

[Win32] undef MessageBox since it will be conflicted with cocos2d::MessageBox.
Merge pull request #2965 from dumganhar/develop

[Win32] Adding COCOS2D_DEBUG=1 for liblua project. Adding missing files in liblu...
Typo fixes in CCNode.h.
Merge pull request #2966 from dumganhar/develop

Typo fixes in CCNode.h.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into scrollview_develop