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.
Merge branch 'master' of https://github.com/CleverRaven/Cataclysm-DDA into Shoggoth_skin
Removed shogs from slime pits, added them to monster lab end.
Merge branch 'Shoggoth_skin' of https://github.com/Soyweiser/Cataclysm-DDA into Soyweiser-Shoggoth_skin