After a transcoding job is complete, we need to update the corresponding
filename since the transcoder, rather than overwriting an existing file,
changes the filename of the output file. This ensures that the right
file is tagged later on.
- The constructor of the AlbumInformation struct now takes no arguments.
- Only add tracks to the rip list if their track numbers are valid.
- Only call cdio_get_media_changed if we have a valid cdio_ object.
- Add a description of the ripper class.