BUG: norm for kroupa prior needed to be defined in init
BUG: norm for kroupa prior needed to be defined in init

bmockler/MOSFiT,mnicholl/MOSFiT,mnicholl/MOSFiT,guillochon/MOSFiT,mnicholl/MOSFiT,guillochon/MOSFiT,villrv/MOSFiT,guillochon/MOSFiT,villrv/MOSFiT,bmockler/MOSFiT,guillochon/FriendlyFit