[Checkins] [zopefoundation/zope.tal] fbfc90: Add Python 3.6, drop Python 3.3

[GitHub]

  Branch: refs/heads/py36
  Home:   https://github.com/zopefoundation/zope.tal
  Commit: fbfc90eceaf5c1cbca7ca9d7e41f438348af9fd6
      https://github.com/zopefoundation/zope.tal/commit/fbfc90eceaf5c1cbca7ca9d7e41f438348af9fd6
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-08-02 (Wed, 02 Aug 2017)

  Changed paths:
    A .coveragerc
    M .travis.yml
    M CHANGES.rst
    M README.rst
    M setup.cfg
    M setup.py
    M src/zope/__init__.py
    M src/zope/tal/tests/__init__.py
    M src/zope/tal/tests/test_talgettext.py
    M src/zope/tal/tests/test_talinterpreter.py
    M src/zope/tal/tests/test_xmlparser.py
    M tox.ini

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

- Fix tests under PyPy3
- Whitespace cleanup
- Remove _u compat function.
- Enable coveralls and a coverage environment
  - ~82% covered in one run.