Fix the mistakes of the sample.
Merge branch 'master' into dev
Add a ClassFactory.
Modified to allow for the inclusion of Group to Group.
Improved generation logic for Scene.
Add update events to Scene.
Improvement of the sample.
update sample
Merge branch 'master' into dev
Refactoring function openWindow.
Fixed a bug in the removeChild.
Updating one of the sample.
Update Version 2.0.2