Test parsing of id3v2.* metadata
Always parse track numbers as base 10
Test extended header support
Fix extended header support for id3v2.4
Test id3 unsynchronization
Support unsynchronized id3 tags
Test multivalue tags
Support multi-value tags for id3
(Optional commit) Stop using "tag" to describe individual metadata fields. An ID3 tag is *all* the metadata; a frame is a single field.
Store album art on the SD card
Update version of MediaDB to force a refresh
Address djf's review comments
Write some comments about storage areas and do some general cleanup
More comments. Everyone likes comments!
Allow reparsing files during a MediaDB upgrade

TODO:
* Need a better UI while we're actually updating (e.g. show a spinner and
  don't let the user touch stuff)