- only document HOMEBREW_* variables in the manpage (although still
read from all the original environment variables).
- resort manpage environment variables in alphabetical order
- check the original path for trailing slashes
GitHub provides a description and homepage field so let `brew create`
use them where possible. Also, detect GitHub repositories based on
`releases` as well as `archive`s.
The existing `brew.1.html` wasn't particularly pleasant to read and
given everything else in `docs/` is a Markdown file it makes sense to
generate a post-processed Markdown file that can in turn be used by
Jekyll to generate a nicely themed HTML file.