implemented basics for having movable uielements in the overlay
Merge branch 'master' into feature/overlay-movable

Conflicts:
	Hearthstone Deck Tracker/MainWindow.xaml.cs
	Hearthstone Deck Tracker/Windows/OverlayWindow.xaml.cs
Merge branch 'master' into feature/overlay-movable
overlay items moveable and scalable via "unlock",

removed lots of sliders,
overlay can be reset to default,
Merge pull request #99 from Epix37/feature/overlay-movable

Feature/overlay movable