[Checkins] [zopefoundation/Zope] 83df24: Keep buildout artifacts in tox env dir.

[GitHub]

  Branch: refs/heads/better-tox-buildout-integration
  Home:   https://github.com/zopefoundation/Zope
  Commit: 83df2470241187aa791b5e04ba53b37829c92597
      https://github.com/zopefoundation/Zope/commit/83df2470241187aa791b5e04ba53b37829c92597
  Author: Tres Seaver <tseaver at palladion.com>
  Date:   2017-05-22 (Mon, 22 May 2017)

  Changed paths:
    M .travis.yml
    M buildout.cfg
    M tox.ini

  Log Message:
  -----------
  Keep buildout artifacts in tox env dir.