Move BindingListViewModel to client lib
Solutionapolooza

 - Add Tempest.Social projects
 - Add iOS projects
 - Add Android projects
 - Setup proper platform separation in SLN
 - Rename Gablarski.Clients to Gablarski.Clients.Core for platform naming
   additions.
CommandBindingSettingEntry -> CommandBindingViewModel
Add NuGet
Enable NuGet restore
Add R# annotations
Bring in MVVM Light
Drop AnonymousCommand for RelayCommand
Add GablarskiClient.Social/StartGroupWithAsync
Bring over started view models from redux