[x] BitTorrentv1 files are now broken, probably should get subsumed into the directory ADL like UnixFS does and just have a BitTorrent v1 (or even just BitTorrent) ADL
[ ] Use a different codec number for WAC
Nice to have:
[ ] CAR files rather than just blocks for fixtures to make writing fixtures with selectors easier
Some outstanding items before merging:
Nice to have: