* RetServMobile.sln: Setup main controller and authentication

* Main.cs:
* AppUser.cs:
* Info.plist:
* AppDelegate.cs:
* CustomGlobals.cs:
* Entitlements.plist:
* RetServMobile.csproj:
* MainStoryboard.storyboard:
* RetServMobileViewController.cs:
* RetServMobileViewController.designer.cs:
* Contents.json:
* Default-568h@2x.png: