Random Thoughts

* Settings dialogs for each extra src...
* Find out why the overview bar in the record dialog won't redraw the cursor.
* Move the statusbar popup menus to libmarlin for others to use.
* When the overview bar position changes in the record dialog, set the playback
  position.
* Listen for errors on pipelines

Bugs/Things I've found and don't want to forget
* Recording into/over an existing sample doesn't seem to be implemented
* Marker-view needs to support changing the scale to frames/time/etc
* Need a vscale ruler.
* Need to work out how to do the piecetable thing.
* Make marlin do editing in a pipeline.
* Vorbis save dialog
* Edit metadata.
* Native file format - flac inside a matrotska container with ? as a metadata part
