loop feature

[cburgard]

It would be nice to be able to loop tracks. The interface doesn't matter too much, the easiest might be a function loop that just loops the currently playing track indefinitely unless skipped or stopped. However, I don't understand enough about the way the playback queue is currently handled in order to confidently propose a way to implement this, so it would be nice if @jarulsamy could do this (or at least post a few pointers here on how this could be done).