Shoggoth skin + morale fix on max regenned hp. + spawn location.

 Removed anger triggers on shoggot, this should make it more agressive.
Updated the skintype to return the correct message on hit.

Added new monster tag. REGEN_MORALE, regens morale and anger on a monster when it has max hp. Up to the monster types max. Added this tag to the shoggoths. To stop them from fleeing like a little girl when they are at max hp.

Added the shoggoth as a spawn to slimepits undergrounds. As it did not spawn otherwise.