Some semi-random thoughts on terrain generation

[xoft]

SprinkleSmallFoliage generator (responsible for long grass placement) isn't biome-aware. Eventually, it should get a biome-aware counterpart, but it's not too high on the priorities list.

I think we should remove Mushroom biomes from the DistortedVoronoi's default biome list altogether. Leave it for yet another generator, a better one, that can place Mushroom biomes into oceans only