MAINT: likelihood now properly deals with NaN model mags for upp lims
MAINT: likelihood now properly deals with NaN model mags for upp lims

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