We already do this in the license bodies, and we need to
match here (currently we just print junk like `replace <>
with ...` because we end up with garbled HTML.
This replacement should arguably be factored out, as it
would want to be the same everywhere (and we might want to
make it bold everywhere or something).
* Move licenses to license template
* Move home / about to page template
* Move annotations to config file, included via annotations.js
* Move license metadata to YML Front matter
* Automate the presentation of license metadata
* Move sidebar to include
* Add _site to gitignore
