Adds a random map generator tailored for the Dune 2000 mod,
D2kMapGenerator.
This map generator has some limitations compared to the RA/CnC
map generator (ExperimentalMapGenerator):
- Symmetry is far less accurate for non-trivial rotations.
- No circular map shapes.
- Unplayable regions are not obstructed and no symmetry corrections
are applied. This is partly due to mod limitations (e.g., no
decorative actors), but I've also considered it less important.
- Somewhat higher map generation failure rates, due to more extreme
play-space requirements.
In order to support the map generator, some additional features are
added to common map generation utilties:
- A "FromTemplates" MultiBrush collection shorthand.
- Path partitioning logic in Terraformer, use to split paths into
multiple TilingPaths with different segment types.
The terms "width" and "height" are clearer and they match what the values actually represent (window or parent width/height). The YAML changes are generated with the update rule.
