Make more accessible Core Tor documentation

There's Core Tor documentation distributed in three (at least) sources. Even if it's documentation intended for developers, it'd be great that it would be more accessible by providing the HTML version online and using some torproject.org subdomain or path or links. The sources are:

• The HTML that can be generated from little-t tor code (with doxygen): https://people.torproject.org/~nickm/tor-auto/doxygen/
• Nickm's torgut repository: https://gitweb.torproject.org/user/nickm/torguts.git/tree/. Files are in markdown, the can be converted to HTML.
• The documentation included in little-t tor code: https://gitweb.torproject.org/tor.git/tree/doc/HACKING (also markdown).

I can provide scripts to generate/convert the documentation automatically. We would need to decide where to put it, maybe get subdomain and get access to the server where it would live.