Improvements to fast setting
For online playground running, we currently have a "fast setting" which decreases the nlive to 100 and a few other things. Instead, we could have "fast settings" which
- Changes the prior to a "fast prior" which is non-spinning, q=1, theta_jn=1 (and anything else people think of)
- Changes the number of calibration nodes to 3
- Sets a dlogz of 5