[BackgroundExecution] fix supported orientations. fix archs. fix sdk version
Xamarin.iOS 8.6.0.2
[BackgroundExecution] fixed namespace, fix output name, fix class name
Xamarin.iOS 8.6.0.2
[BackgroundExecution] remove empty folders. remove dependency from xib file
Xamarin.iOS 8.6.0.2
[BackgroundExecution] updated xib file
Xamarin.iOS 8.6.0.2
[BackgroundExecution] fix readme

Xamarin.iOS 8.6.0.2
[BackgroundExecution] simplified code with Task

Xamarin.iOS 8.6.0.2
[BackgroundExecution] capitalize property name. add register attrib
[BackgroundExecution] simplified code via Task. start use string.Format
Xamarin.iOS 8.6.0.2