all-versions

Checkout some/all versions at once in subdirs with index page

First sketchy version. No command-line arguments yet.

Just run in repo root and it creates build-site/$tag for each tag, and "live" for what's currently in the directory.

Writes build-site/index.html with the change log and links.

Aborts if it can't safely do checkouts.

There's some support for status.html that's probably not very general.

TODO:

• command line arguments instead of hardcoding stuff
• HTML diff