Merge pull request #1185 from dingpinglv/Iss2852_RefactorMultResources

Fixed #2852: Corrected a RenderTexture's mistake for multiple resolution
fixed #2965: refactor ParticleExamples for jsb
Merge pull request #1186 from dingpinglv/Iss2965_RefactorParticleExamples

fixed #2965: refactor ParticleExamples for jsb
Fixed #2852: The bug has been fixed that Scale9Sprite doesn't work correctly when it's texture loads asynchronous