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
fixup
Merge pull request #23 from motherdear/fixup_branch

Fixup branch