ENH: change how BD mass function is passed from init to process in fallback.py
ENH: change how BD mass function is passed from init to process in fallback.py

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