[feature request] User-configurable star thresholds

[Kixel]

The current system is a reasonable default.
I'd love to be able to set my own values for the star thresholds.
I don't really listen to popular music, so the ratings for a lot of my lib is around 10-60 (even in one album) and mostly right for within an album, but doesn't cover the whole spectrum.
LMK if this is possible - or if I should just do it myself. Editing the sptnr.py file is not hard, just would love it to be a feature.