[Checkins] [zopefoundation/Products.ExternalEditor] e8911c: Add tox.ini + configure TravisCI.

[GitHub]

  Branch: refs/heads/add-tox-and-travis
  Home:   https://github.com/zopefoundation/Products.ExternalEditor
  Commit: e8911cf2aabfe598a127146c564bc2741c750fee
      https://github.com/zopefoundation/Products.ExternalEditor/commit/e8911cf2aabfe598a127146c564bc2741c750fee
  Author: Michael Howitz <mh at gocept.com>
  Date:   2018-03-01 (Thu, 01 Mar 2018)

  Changed paths:
    A .coveragerc
    M .gitignore
    A .travis.yml
    M setup.py
    A tox.ini

  Log Message:
  -----------
  Add tox.ini + configure TravisCI.

Tests currently fail, maybe someone can look into them.

Maybe I have to use the version pins of Zope 2.13.27 to a a compatible set of
packages.