BackgroundExecution: Fix button hiding behind NavigationBar
ImageProtocol: Fix status bar overlapping text on iOS 7
PassKit: Fix navigation bar overlapping buttons at the top of the screen.
Merge branch 'master' of github.com:xamarin/monotouch-samples
Merge branch 'master' of github.com:xamarin/monotouch-samples
Merge branch 'master' of github.com:xamarin/monotouch-samples
Merge branch 'master' of github.com:xamarin/monotouch-samples