[Checkins] [zopefoundation/Zope] b0b3a6: Add 2.13.28 release.

[GitHub]

  Branch: refs/heads/gh-pages
  Home:   https://github.com/zopefoundation/Zope
  Commit: b0b3a6bb6eb75e417fb164f1ae99c8794c818ad1
      https://github.com/zopefoundation/Zope/commit/b0b3a6bb6eb75e417fb164f1ae99c8794c818ad1
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-04-23 (Mon, 23 Apr 2018)

  Changed paths:
    M README.md
    M build_index.sh
    A releases/2.13.28/requirements.txt
    A releases/2.13.28/versions-prod.cfg

  Log Message:
  -----------
  Add 2.13.28 release.


  Commit: a03f4f2d5a87a6a6bc5b77f996ae044310dbefb8
      https://github.com/zopefoundation/Zope/commit/a03f4f2d5a87a6a6bc5b77f996ae044310dbefb8
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-04-23 (Mon, 23 Apr 2018)

  Changed paths:
    M releases/master/requirements-full.txt
    M releases/master/versions-prod.cfg
    M releases/master/versions.cfg

  Log Message:
  -----------
  Update to current versions used on master.


Compare: https://github.com/zopefoundation/Zope/compare/2435fde46118...a03f4f2d5a87