copyright update
fixed some errors in arcticskies1.png background
Fixed some tile issues in A Ghostly World, still needs attention.
Fixed forest slope tiling issues in forest world except for key levels and some levels not in the worldmap.
fixed some stuff in village level.
updated bonus1 worldmap to use the new snow tiles to the the path tiles issue. visuals can be improved now also
Icebridge tiles improvements, fixes #1044, thanks to 165your4
Correctly parse file:// urls