- Created binaries/data/mods/official/maps/random folder to store maps
and also moved rmlibrary.js to maps (though perhaps it should be
somewhere in system?).
- RM generator now uses "logical terrains" that can have units attached
to them in addition to textures, for things like forests.
- Added basic clump placer, avoid constraints, layered painter, and
random terrains (each tile is chosen between several options).
- Misc. infrastructure changes.
This was SVN commit r2378.
