issue #2784:Add js-binding and lua-binding document
issue #2784:Add js rename function comment
issue #2784:Add constructor and destrutor comment
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into master_doxygen
issue #2784:Add extension class comments
issue #2784:Add extension class comments
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into master_doxygen
Merge pull request #3746 from samuele3hu/master_doxygen

[ci skip]issue #2784:Add js-binding and lua-binding document