Adding the playlist and autoplaylist adding methods.
It doesn't do the adding of autoplaylist rules or the adding of tracks,
yet.
Adding on update/delete triggers to playlist tracks FKs
Also adding a new stored proc that allows for insertion of a playlist
track into the middle of the playlist
Adding db method for adding a track to a standard playlist
Adding a track to a playlist is also supported
Refactoring the playlist operations into a playlist manager
Adding a delete playlist operation
Adding a get all playlists operation
Making the ID of a playlist serializable