`CCLuaEngine::executeLayerTouchEvent` is for `TargettedDelegate`, it means that no multi-touch events are sent.
So is `ID` flag needed?
Do you think that `ID` should only be used for `multi-touch`?
Do we just need add `ID` for `CCLuaEngine::executeLayerTouchesEvent(CCLayer* pLayer, int eventType, CCSet *pTouches)`?