[Checkins] [zopefoundation/zope.datetime] 785485: Add Python 3.6 and drop Python 3.3

[GitHub]

  Branch: refs/heads/py36
  Home:   https://github.com/zopefoundation/zope.datetime
  Commit: 785485af23294948f84387191113246165b6975e
      https://github.com/zopefoundation/zope.datetime/commit/785485af23294948f84387191113246165b6975e
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-08-03 (Thu, 03 Aug 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 tox.ini

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

- Badges
- Enable coveralls
- Standard coverage and travis setup for caching, current pypy3
  versions, etc.
- We don't yet have 100% coverage.