Refactor #4027: texture getter/setter defined in cc.ParticleBatchNode
Refactor #4027: cc.ParticleSystem getter/setter defined
Merge branch 'gettersetter' into develop-3.0

* gettersetter:
  Refactor #4027: cc.ParticleSystem getter/setter defined
  Refactor #4027: texture getter/setter defined in cc.ParticleBatchNode
Merge branch 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5 into develop-3.0

# Via dingpinglv
* 'develop-3.0' of https://github.com/cocos2d/cocos2d-html5:
Merge pull request #1574 from pandamicro/develop-3.0

Refactor #4027: cc.ParticleSystem and cc.ParticleBatchNode getter/setter defined