ArtistCollection raises events when an artist is added or removed.
Implemented add and remove events for albums in library.
Merge branch 'NewLibrary' of github.com:deaddog/DeadDog.Audio into NewLibrary
Added MoveToFirst, MoveToLast and MoveToEntry to the playlist interface.
Merge branch 'NewLibrary' of github.com:deaddog/DeadDog.Audio into NewLibrary
Added Contains to playlist interface and implemented the new interface methods in Playlist[T].
Implemented add and remove events for tracks.
Merge branch 'NewLibrary' of github.com:deaddog/DeadDog.Audio into NewLibrary
Started implementation of playlistlist and playlistcollection.
Merge branch 'NewLibrary' of github.com:deaddog/DeadDog.Audio into NewLibrary
Added addPlaylist and removePlaylist to playlist collection.
Merge branch 'NewLibrary' of github.com:deaddog/DeadDog.Audio into NewLibrary
Finished AlbumPlaylist and ArtistPlaylist