JSKit 是 iOS 框架。
类：
JSAnimationStep
JSCircularImageView
JSZoomableImageView
JSZipArchive
类别：
NSDate+String
NSObject+Associated
NSString+CharacterCount
UIColor+Colors
UIControl+Event
UIImage+BlurEffects
UIImage+Color
UIImage+SizeOfFit
UIView+Animation
UIView+Properties
UIView+Snapshot
