ENH: `KeyboardInterrupt` prompt should now work during fracking
ENH: `KeyboardInterrupt` prompt should now work during fracking

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