#26 A new map editor using GTK+

[Günther Brammer]

I couldn't stand the user interface of mapdraw, so I
started to make a new map editor. It does not have many
features yet, just very basic editing of layer1-3, but
that's already enough to fix up the maps for the
diagonal movement :-) (Use strg+click to pick up a tile
and click to draw)

Short term todo is to support editing of the other
aspects of the map and to display the palette.

[Günther Brammer]

mapdraw2 files and build system diff