Latest Disobedience screenshots

What's new here:

• The queue and choose tabs now use a GtkTreeView rather than locally implementing everything in a layout. The main effect of this is that everything works in a manner much more consistent with other GTK+ applications, and you can do things like rearrange and resize the columns (although GTK's implementation of column resizing is crazy and broken).
• GTK+ (or rather Pango) takes care of ellipsizing long track names, which means they are truncated at the column's edge, rather than being truncated to a fixed size and forcing the column width.
• The choose tab now has the track length visible and a checkbox that not only shows the playing state but also can be used to add the track to the queue. The latter isn't completely new, you could always middle-click to do this and a notes icon appeared by playing tracks, but now it's much clearer that you can do this.

This is all on a branch and there's still more work to do but will be in a future release.