ENH: reducing `N_INT_TIMES` in `Diffusion`, new gridding makes 1000 overkill (and slow)
ENH: reducing `N_INT_TIMES` in `Diffusion`, new gridding makes 1000 overkill (and slow)

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