Currently, through the command line interface, people can save the current
playlist with a name, but not delete saved ones.

It will be good if we can issue some kind of commands to delete saved ones. 
Here is an example of possible command structure,

playlistdeletes <taggedParameters>

where <taggedParameters> can be,

playlist_id --- the id number as returned by the playlists command

or even,

playlist_name --- the playlist name as returned by the playlists command, but I
like the id number more.

It will be good if we can a single command to delete a single track in the saved
playlist as well.  However, at this stage, we can load the playlist into a
player, delete/move tracks, then save it back with the same name to overwrite
the file, so this one is not crucial.

However, I think we really, really need to have a way in command line interface
to remove saved playlist(s) completely...