sampsyo/beets — pull request #11 by KraYmer (2011-10-12 20:52:05+00:00)
Title: lastgenre plugin: genres canonicalization

**add genres canonicalization: when a last.fm tag is found but rejected (because not in user whitelist), try to found a parent tag that is accepted.**

I did use http://en.wikipedia.org/wiki/List_of_popular_music_genres as reference to build the tree and did read specific genres pages to better comprehend filiations between genres and move nodes in the base tree.