ENH: don't rewrite filter .dat files if `--prefer-cache` set
ENH: don't rewrite filter .dat files if `--prefer-cache` set

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