* Add EventDispatcher#hasEventListener (sync from creator)
* Fix function wrapper using js object during its gc
* Support more system languages
* Direct log/error for better understanding problems & add sys.now
* Synchronize Editbox APIs
* Synchronize Scheduler.PRIORITY_NON_SYSTEM const
* Upgrade web engine
* Upgrade test cases
* Manually bind EventDispatcher::addCustomEventListener to avoid memory issue
* Manual bind EventListeners’ create to avoid memory issue
* Fix compilation issue when COCOS_DEBUG = 2
* Unify function name of Texture2D::releaseTexture
* Fix compilation issues and update web & bindings-generator
* Fix lua compilation issue
* Use %ld instead of %zd