Added RestorePackages.bat to increase restore NuGet package performance
(*) [CTL-42] Small code improvements and added first unit tests.
(*) CTL-42 Added ServiceHost unit tests.
(+) Created Catel.MVVM.PCL project
(-) Removed AutoDisposeHelper
Merge branch 'feature/CTL328_Xamarin' into develop

* feature/CTL328_Xamarin:
  (+) Created Catel.MVVM.PCL project (-) Removed AutoDisposeHelper
(x) CTL-329 VisualStateManager doesn't change state in WP8 in UserControl => introduced option to transfer styles and transitions: UserControl.TransferStylesAndTransitionsToViewModelGrid (default value is true)
CreateNugetPackages script fix to prevent dummy directories