MAINT: don't make dir if already exist
MAINT: don't make dir if already exist

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