biome work
Output to different dir
meh.
Rohan grass palette (pre-1.7.2 stylee)
fern and tallgrass should be colored by biome now
Tweak tallgrass slightly brighter
Revert "Output to different dir"

This reverts commit 47bd02f582751f9b6bb810aaa6ea57a7b3faaff4.
Merge remote-tracking branch 'origin/biomes'