Fix block data in MaterialSet sometimes being broken
Improve VirtualBiomes logic

Got rid of the id conversion tables. We now use the biome array in
LocalWorld instead of BiomeBase, which has CustomBiome (extends
BiomeBase) instances that automatically replace the id.
Improve /tc biome command

The command now has a new option, -s, to view the biome that is saved to
the world. The command now also displays the biome id, in addition to
the biome name.

The command no longer lists the biome wetness when using the -f flag,
you can just look it up in the BiomeConfig.

The temperature display in -f has been improved, it will now take the
height into account too.