Make vines and spiderwebs more "unified"

[orphu]

Right now certain rooms will contain webs or vines. This makes the dungeon feel disconnected.

Remove the vine and web passes from specific rooms and make a global map for these things that will add these to areas of the dungeon. Use biome information to make wet biomes more likely to have areas of vines, and dry biomes to have webs.

Certain features can seed an area with vines (WildGrowth) or webs (SecretSepulchure)