this allows us to port to artfiles always too... this way
music-control displays the albumart. music-control is a bit broken in
that it doesnt keep aspect ratio etc. of these. need to fix that over
there.... but... it's coming together.
make sure XXX's are for things to do still, list all the mime types
fully that i can find (well ok - should get from emotion but it doesnt
expose this), and dont expose functions that don't work in the dbus
api and note what is imcomplete at the top
this should dot i's and cross t's on the mpris support for now.
Carsten Haitzler