For use when tracks are manually selected. I use this to wire up a
response to double-clicking the playlist view.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
And anything else that needs it. This lets us define all the fields
expected by other parts of the Emmental system without needed to read a
track file.
I also switch over the test_tag.py and test_tagstore.py files while I'm
at it.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>