Screen transitioning. MiniMap

So I started screen transitions here. up, down left and right. Up
currently doesn't graphically update properly. The minimap has been added
as well. It should ++ or -- the position of the green dot on a gray
backround based on your position, but it currently doesn't do 100% that.
Since the 'overworld' isn't made yet, you can keep walking in any 1
direction permanitally. Thus the minimap graphical display can also go
beyond it's gray bounding area as of right now.