enhancement: buildings without an owner report their lack of upkeep to the entire region.
https://bugs.eressea.de/view.php?id=1713
Merge pull request #75 from badgerman/bug-1713

enhancement: buildings without an owner report their lack of upkeep to t...
WIP: Familiars check for combat spells in the magician's list of spells, too.
https://bugs.eressea.de/view.php?id=1660
This does not work, because set_combatspell later uses knowsspell to make sure the spell is one the familiar has.
Merge pull request #77 from badgerman/bug-1660

Bug 1660
bugfix: monster races that cannot learn skills, will not try to study.
This fixes https://bugs.eressea.de/view.php?id=2054
also prevent monsters from studying unarmed combat if they cannot learn things.
refactor the unit_can_study functionality into a separate function, we are now using it in multiple places.
Merge pull request #79 from badgerman/bug-2054

Bug 2054: monsters trying to STUDY when they cannot.