add target to build All target
decouple libcocos2d and cocosdenshion
refactor getScale9Enabled to isScale9Enabled
move utf8_substr to ui::helper class.
add utf8 support for UITextField
change unsigned long to size_type
refactor
Merge branch 'v3' into v3_buildAllTarget
refactor UIButton
refactor ImageView
refactor Slider control
refactor loadingBar
refactor Layout
remove CC_CONSTUCTOR_ACCESS fow win32 release
fix minor bugs of UISlider and remove unused header include in ListView
refactor, improve imageView stability
fix ios build code sign
refactor, optimize Scale9Sprite
Merge pull request #7629 from heliclei/fix-ios-code-sign

fix ios build code sign
Merge pull request #7628 from dabingnn/v3_removeConstructAccessMacro

remove CC_CONSTUCTOR_ACCESS fow win32 release