Fohlen/minimal

This is a very basic archive that provides the default structures of packages/
There are still issues (missing) with some texture packages as well as the non-free models.
The branch is meant as a first cleaned-up version of the sauerbraten packages/ archive including 3 base maps from Quadropolis and almost insane licensed textures and sounds.
Old maps and models (which infringe the copyright) will be outsourced to a backward-compatible package.