Added OptionsWindow.xaml and OptionsViewModel to create the setup window
Added BackupType enum, OptionsViewModel constructors and properties, test button on
Expanding OptionsViewModel.cs and making data binding in xaml
Started adding use of MVVM Light messenger service to communicate between windows
Completed implementation of MVVM Lite Messenger class Register/Send to communicate between options window and mainwindow. Created a new class, OptionMessage, in the Helper folder to carry data between the windows.
Added basic code for AddGameWindow
Added basic logic to AddGameViewModel, added basic test UI to its xaml, and added method stub in GiantBombAPI AddToJ