doc/README

automation: create Python 3.5 variant of requirements.txt

The automation environment is refusing to build with the previous
file because some dependencies won't install on Python 3.5.

I couldn't find an easy way to salvage the situation with a single
requirements.txt file. So, I decided to introduce a variant
for Python 3.5.

As part of this, we update packages to latest versions.

(I do question why we are still supporting Python 3.5...)

Differential Revision: https://phab.mercurial-scm.org/D10690

Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:

  http://docutils.sourceforge.net/rst.html

It's also convertible to a variety of other formats including standard
UNIX man page format and HTML. You'll need to install Docutils:

  http://docutils.sourceforge.net/

Use the Makefile in this directory to generate the man and HTML pages.