Issue #5704: CCUIPreformance - Fixed a problem about checkbox default value
Issue #5704: CCUIPreformance - Fixed a problem about UIImageView resource loading
Issue #5704: CCUIPreformance
1. update uiReader
2. The default value of CheckBoxReader
3. The default value of ScrollViewReader
Merge pull request #2014 from VisualSJ/Iss5704_CCUIPreformance

Issue #5704: CCUIPreformance - Fixed a problem about checkbox default va...