Adding constraints to default slsn model
Adding constraints to default slsn model

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