BUG: xm array in viscous.py did not include 0
BUG: xm array in viscous.py did not include 0

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