New delegate `updateManagerWillExitApp` for `BITUpdateManager` that is invoked right before the app wil exit to allow app update to start (>= iOS 8 only)
Uses neverending UIAlertView by default, can be exchanged by implementing a new delegate. Automatically disabled when the app is running from the App Store.
- Change Prefixes to BIT
- Make one shared instance and change the functionalities to modules
- One bundle for resources
- Targets for framework and static libs
- Other cleanup