MAINT: still refactoring
MAINT: still refactoring

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