Fixes age old issue of items with temperature causing ghost dupes. turns out it was the server syncing the new item data with the client every tick. Changed so that temperature is only synced if there is a +-5 degree temp difference.
Fixed cows spawning as calves. oops.
Made sequoia leaves/logs smarter when they get placed by the treegen to not replace pre-existing blocks. Hopefully didn't break sequoia in the process. Resolves #132
fixed baby sheep now. derp