closed #5537: add setAutoStep, isAutoStep and step method for PhysicsWorld.
closed #5537: add test case
Fix video scale issue in iOS
Optimize FPS control algorithm under Android.
Refactor #5580: Add new file&directory apis into FileUtils
Refactor #5580: Fix Win32 compile issue
Refactor #5580: Fix some issues
Refactor #5580: Add test case for FileUtils' file and directory manipulations
Merge branch 'v3' of git://github.com/cocos2d/cocos2d-x into FileUtils_FILE_API
Cascade slide ball's opacity and the Slider's
Also cascade the colours
Refactor #5580: Make isDirectoryExist support relative path
Refactor #5580: Refactor Hungary style code in test case
no use JoinThread
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
fixed crash cause by incorrect font name.
Merge branch 'v3' of https://github.com/cocos2d/cocos2d-x into v3
fix LabelAtlas constructor to CC_CONSTRUCTOR_ACCESS
use CC_CONSTRUCTOR_ACCESS in ParallaxNode