[Checkins] [zopefoundation/zope.size] abaef3: Add Python 3.6, drop Python 3.3

[GitHub]

  Branch: refs/heads/py36
  Home:   https://github.com/zopefoundation/zope.size
  Commit: abaef35b2dce9379362f92bf5c8e4a2808fbdfa5
      https://github.com/zopefoundation/zope.size/commit/abaef35b2dce9379362f92bf5c8e4a2808fbdfa5
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-07-27 (Thu, 27 Jul 2017)

  Changed paths:
    A .coveragerc
    M .gitignore
    M .travis.yml
    M CHANGES.rst
    M MANIFEST.in
    M README.rst
    A setup.cfg
    M setup.py
    M src/zope/__init__.py
    M src/zope/size/tests.py
    M tox.ini

  Log Message:
  -----------
  Add Python 3.6, drop Python 3.3

- Badge readme
- Add coveralls and tox coverage environment
- Install ZCML deps as test deps for 100% coverage and to test
  configure.zcml on CI.