install: replace mp3 library eyeD3 => python-mutagen {mid3v2}
tag: replace mp3 tag reading tool eyeD3 => mid3v2

more direct id3 v2 frame handling, while coercing id3v1 to v2
tag: added fallback id3 frames for when the default ones arent set in mp3s
tag: coerce id3 frames TYER and TDAT into date tag for mp3s