Merge pull request #6894 from andyque/refactor5183

refactor Layout, LayoutParameter and LayoutExecutant
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #6896 from CocosRobot/update_cocosfiles_1401082939

[AUTO][ci skip]: updating cocos2dx_files.json
[AUTO]: updating luabinding automatically
Merge pull request #6897 from CocosRobot/update_lua_bindings_1401083002

[AUTO]: updating luabinding automatically