remove rendered files in public/ from repo
This was a useful experiment in publishing, but it wound up being a
giant pain in the ass in practice.
Going forward, I'm either going to render server-side like I used to do
(which is easy, so why not), or rsync a publication directory. I might
even version the published material, but I don't think I'll do it in the
same repo as the source archives. It's just too much crap to deal with,
and minor changes in something like a template lead to a huge amount of