Add CLI Parameter `--no-extra-files`

[ebb-earl-co]

This pull request adds a feature requested in #63: the option not to attempt to download the "extra" files that are available from the TIDAL API. To wit, these are

• Artist's bio JSON file
• Artist's image JPEG file
• Album review JSON file
• Playlist .m3u8 text file
• Playlist description .txt file
• Playlist image JPEG file
• Mix image JPEG file