Make ID3 data viewable in Windows

Windows Explorer and Media Player cannot read ID3v2 data without first having ID3v1 data present. This makes it necessary to first enable ID3v1 if it was not already enabled on the files (which apparently Bandcamp does not)


More syntax info from 
http://mutagen.readthedocs.org/en/latest/api/id3.html#mutagen.id3.ID3.save