Feature Request: 5-star ratings

Personally, I depend deeply on a 5-star rating scale to curate my music. At different times, I feel like listening strictly to my favorites vs. a wider variety, and to that end I build playlists based on my ratings.

Currently Groove Basin doesn't support ratings (AFAICT), which prevents me from switching, but if it did support them and if I could configure Auto DJ based on them (favoring higher ratings, but mixing in lower ratings with some adjustable probability), Groove Basin would probably be my perfect music player.

Meanwhile, Google Music (where my music collection is, unfortunately, currently located) just _removed_ 5-star ratings from their UI. :( [Rant here.](https://plus.google.com/+KentonVarda/posts/NJBHcZXtRPH)