Amirouche suggested in May that we make an Awesome Scheme to be included
at <https://project-awesome.org/>. I finally got around to adding some
initial content: <https://github.com/schemedoc/awesome-scheme>. I think
the license and formatting now conform to Project Awesome's guidelines,
but I'm not 100% sure. I probably made some mistakes; feel free to edit
and add things as you like.