v1.6-beta: Swift 3 and general awesomeness

This release will make it into master when Swift 3 and iOS 10 are released.

⚠️ Carthage may not work (I can't test it on macOS Sierra, see Carthage/Carthage#1440)

Changelog

• Added: UIImageView func: loadGif(name: String) with async loading
• Added: Installation section in README
• Changed: Migrated code to Swift 3
• Changed: Renamed all initializers to gif(...)
• Changed: Migrated project to Xcode 8
• Fixed: Carthage support
• Fixed: General enhancements

Contributors

Thanks you all so much ❤️

• @Palleas (#17)
• @WXGBridgeQ (#19)
• @muhasturk (#22)
• @mintakson (#25)
• @samheather (#27)
• @satoshin2071 (#32)