* Add Scheduler.enableForTarget and change to use _id
* Use _id instead of __instanceId in Texture2D
* Fix ParticleSystem __instanceId usage
* Use _id instead of __instanceId in ActionManager
* Fix usage of Scheduler in InputManager
* Use _id instead of __instanceId in EventManager
* Totally remove ClassManager and __instanceId
* Fix initialization process
* Fix touch & mouse listener off check issue
* Fix id not generated issue
* Fix touch & mouse listener being removed by rejected persist node
* Improve logic