Issue #179: don't prompt user with negative 'cost to complete'
Part of issue #90: prevent infinite settler loop
Issue #22: show barbarians from hut FIRST before message
Issue #65: freshly bribed unit doesn't get to move
Auto settlers cheat as a patch setting
Use Enoch Nitti's superior continent calculation
Minor cleanup
Fix issue #64: failed to save fortify/veteran state for FortifiedUnits
Fix resharper noise