Import ratings from Vorbis comments

[Viktini]

I've noticed that importing ratings from FMPS and POPM is possible, however there isn't an option for importing ratings from Vorbis comments, used in - well - Vorbis codecs like FLAC, OGG and Opus. Vorbis comments tend to have a RATING tag for ratings, with a number between 0-100 and increments of tens or twenties depending on the rating system used. MusicBee saves its ratings for Vorbis comments in the RATING tag, so for those coming in from MusicBee, it might be worth adding this option.