Merge pull request #30 from samuele3hu/tip_generator

fix:update submodule and fix some bugs
[AUTO] : updating luabinding automatically
Merge pull request #31 from CocosRobot/update_lua_bindings_1393987629

[AUTO] : updating luabinding automatically
Merge branch 'master' of https://github.com/cocos2d/cocos2d-lua into tip_generator