Removing unused files [tools/lua_project_generator]. [ci skip].
Merge pull request #2960 from dumganhar/develop

Removing unused files [tools/lua_project_generator]. [ci skip].
Don't make Action be inherited from Clonable. Why??  Please refer to https://groups.google.com/forum/?hl=en#!topic/cocos2d-js-devel/dGJYz9wIb4Q , but we need to find out the real reason why VS compiler generate linking errors.
Merge pull request #2961 from dumganhar/develop

issue #2289: Don't make Action be inherited from Clonable.
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into scrollview_develop