Tileset.xcf and Tileset.png and derivatives 
are copyright (c) 2000 Matthias Koester.

Derivatives generated by Alexander Pruss in 2006.

Generating the bmp files requires ImageMagick.

Tileset.png is generated from all the layers of Tileset.xcf
Tileset2d.png is generated by omitting the "Tiles" layer.
