Merge pull request #21 from houguohua/mergecocos3.0

active to setVisible , isVisible
Merge pull request #22 from houguohua/mergecocos3.0

new version
Merge pull request #24 from houguohua/mergecocos3.0

new version
Merge pull request #25 from houguohua/mergecocos3.0

modify template complie bug
Merge pull request #27 from houguohua/mergecocos3.0

shader float Precision
Merge pull request #28 from houguohua/mergecocos3.0

frame count error
Merge branch 'mergecocos3.0' of github.com:cocos2d/cocos3d-x into mergecocos3.0
postprocess,shadow is not support if the device is not high quality.