Merge branch 'master' of https://github.com/alxnek/CSharp_CarDealer

Conflicts:
	CarDealer_GUI/MainWindow.xaml.cs
	CarDealer_GUI/MainWindow.xaml.cs.orig
Deleting unused windows(do not delete app.xaml since that is static main) Also adding documentation
cleaning for merge
Merge branch 'master' of https://github.com/motherdear/CSharp_CarDealer

Conflicts:
	CarDealer_GUI/CarDealer_GUI.csproj
	CarDealer_GUI/ClassDiagram1.cd
	CarDealer_GUI/MainWindow.xaml.cs