[Checkins] [zopefoundation/zope.app.schema] 3faada: Add Python version classifiers.

[GitHub]

  Branch: refs/heads/classifiers
  Home:   https://github.com/zopefoundation/zope.app.schema
  Commit: 3faadadf31309c36bd9dcfc1487a998f72301e44
      https://github.com/zopefoundation/zope.app.schema/commit/3faadadf31309c36bd9dcfc1487a998f72301e44
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2017-05-09 (Tue, 09 May 2017)

  Changed paths:
    A setup.cfg
    M setup.py

  Log Message:
  -----------
  Add Python version classifiers.

Also add setup.cfg to indicate that wheels are universal.