Add deprecation notice

Update version number

Change tab width

Rename `percentVisible` to `fractionVisible`

Merge branch 'ArkadiuszBanas-feature/swift_4'

Update KitchenSink-IB target for Swift 4

Fixed warning about usage of deprecated Range initializer

Swift 3 @objc inference warnings fixed

Codebase migrated to Swift 4

Projects files update for Xcode 9

Fix a bug regarding state restoration

Adapt code style

Merge pull request #83 from AndriyGo/master

Ability to control minimum animation duration

Update DrawerBarButtonItem