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!
Fix Mac compile error

Hadn't seen this on C::B, no idea if it happened there or not.  In any
event, this should clear it up.

You're welcome for the buff, too.  ;-)
Merge pull request #6772 from KA101/FixMutation

Fix Mac compile error