[Checkins] [zopefoundation/Zope] d31cf7: Drop Python 2.6 support. (#480)

[Michael Howitz]

  Branch: refs/heads/2.13
  Home:   https://github.com/zopefoundation/Zope
  Commit: d31cf7701a95b9a7469c61f53c30a610b4f70feb
      https://github.com/zopefoundation/Zope/commit/d31cf7701a95b9a7469c61f53c30a610b4f70feb
  Author: Michael Howitz <mh at gocept.com>
  Date:   2019-02-08 (Fri, 08 Feb 2019)

  Changed paths:
    M .travis.yml
    M doc/CHANGES.rst
    M setup.py
    M tox.ini

  Log Message:
  -----------
  Drop Python 2.6 support. (#480)