Create Citadel class that inherits from Ship. Add Service slots

eos/types.py

@@ -35,9 +35,11 @@ from eos.saveddata.implantSet import ImplantSet
 from eos.saveddata.booster import SideEffect
 from eos.saveddata.booster import Booster
 from eos.saveddata.ship import Ship
+from eos.saveddata.citadel import Citadel
 from eos.saveddata.fit import Fit, ImplantLocation
 from eos.saveddata.mode import Mode
 from eos.saveddata.fleet import Fleet, Wing, Squad
 from eos.saveddata.miscData import MiscData
 from eos.saveddata.override import Override
+
 import eos.db