Adds the scourge of the woods: the dreaded zoose.

Y'all knew this was going to happen one day.
Tweak.
Merge branch 'Ohgodohgodohgodohgod-zombie-moose!' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into Rivet-the-Zombie-Ohgodohgodohgodohgod-zombie-moose!