fix a couple of small bugs in find_genre
fix a couple of small bugs in find_genre

-	stop it freaking out if there's a non-mp3 file in the dir
-	have it throw a warning if there are mp3's without tags
--		(instead of blowing up, which is what it used to do)

barefootcoder/music,barefootcoder/music,barefootcoder/music