random blocks in water (sand, clay, gravel)
Merge branch 'master' of https://github.com/boskee/Minecraft
update
random primitive trees
Temp push
catchup to boskee
separate trees, wildfood, plants, each has rnd.

wildfoods, plants and trees has separate, configurable random chances to
show up.  also, ferns, and seed items
ferns will randomly drop seed now
terrain-biome options, random start backdrop
Merge branch 'master' of git://github.com/ronmurphy/Minecraft

Conflicts:
	terrain.py