* src/Extensions/Banshee.AudioCd/Banshee.AudioCd/AudioCdDiscModel.cs: Use the SortName information from MusicBrainz, and detect if an album is a compilation album and set the album and all the tracks appropriate if it is.
* src/Extensions/Banshee.AudioCd/Banshee.AudioCd/AudioCdRipper.cs: Set the FileModifiedStamp and LastSyncedStamp when a track is ripped.