MAINT: added ls for diag
MAINT: added ls for diag

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