should have had id3 tags, and trying everything, I tried one
more mp3 file: bingo.
Added MediaPlayer.getMetadata() and a METADATA event.
Contents of metadata vary by media being played and are open for
interpretation by users of the player.
FLV video returns their metadata object.
MP3 audio returns id3 tags.
git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@708 ed5b42cb-e716-0410-a449-f6a68f950b19