[Checkins] [zopefoundation/Zope] f8e202: Add 4.0 release.

[Michael Howitz]

  Branch: refs/heads/gh-pages
  Home:   https://github.com/zopefoundation/Zope
  Commit: f8e20223bfbdd521799deea4d44ff07d7b443c1c
      https://github.com/zopefoundation/Zope/commit/f8e20223bfbdd521799deea4d44ff07d7b443c1c
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-05-10 (Fri, 10 May 2019)

  Changed paths:
    M README.md
    M build_index.sh
    A releases/4.0/constraints.txt
    A releases/4.0/requirements-full.txt
    A releases/4.0/versions-prod.cfg
    A releases/4.0/versions.cfg
    M releases/master/constraints.txt
    M releases/master/requirements-full.txt
    M releases/master/versions-prod.cfg

  Log Message:
  -----------
  Add 4.0 release.