Merge pull request #2012 from dingpinglv/Iss5704_CCUIPreformance

Fixed #5704: Fixed a bug of GUIReader
Issue #5704: Fix bug about UIText
Merge branch 'Iss5704_CCUIPreformance' of https://github.com/VisualSJ/cocos2d-html5 into Iss5704_CCUIPreformance
Fixed #5704: correct a mistake of ccui.TextField