issue #2506: use direct call parent's function instead this._super for extensions
fixed #2506: Optimize performance for ContolButton, ScrollView and TableView etc
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss2506_OptimizePerformanceForExtension
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-html5 into Iss2506_OptimizePerformanceForExtension
Merge pull request #1098 from dingpinglv/Iss2506_OptimizePerformanceForExtension

fixed #2506: Optimize performance for ContolButton, ScrollView and TableView etc