[Checkins] [zopefoundation/Zope] 659adc: - add ``tox`` test configuration [ci skip]

[GitHub]

  Branch: refs/heads/2.13
  Home:   https://github.com/zopefoundation/Zope
  Commit: 659adcaf32da5b1b1aff6469766e180f2aa0ca7b
      https://github.com/zopefoundation/Zope/commit/659adcaf32da5b1b1aff6469766e180f2aa0ca7b
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2017-12-01 (Fri, 01 Dec 2017)

  Changed paths:
    M .gitignore
    M buildout.cfg
    M doc/CHANGES.rst
    A tox.ini

  Log Message:
  -----------
  - add ``tox`` test configuration [ci skip]