This release supports Xcode 8 beta and Swift 2.3.

Changes:

- Support Xcode 8 beta and Swift 2.3. Thanks, @ikesyo and @sharplet!
- Fixed a potential crash, in which a `QuickSpec` subclass could call
  `+[QuickSpec initialize]`, thus kicking off an infinite recursion. Thanks,
  @briancroom!
- Disables bitcode on tvOS. Thanks, @phatblat!