[Checkins] [zopefoundation/Zope] 914fa8: - Change required Python version to 2.7 due to ``A...

[GitHub]

  Branch: refs/heads/jens_stable_213
  Home:   https://github.com/zopefoundation/Zope
  Commit: 914fa88138f49f8c14b0dc330835978a697ef674
      https://github.com/zopefoundation/Zope/commit/914fa88138f49f8c14b0dc330835978a697ef674
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2017-12-01 (Fri, 01 Dec 2017)

  Changed paths:
    M doc/CHANGES.rst
    M setup.py
    M version_ranges.cfg

  Log Message:
  -----------
  - Change required Python version to 2.7 due to ``Acquisition`` update.

- Update ``Acquisition`` version to 4.4 due to crash bug (#21).
  Update dependencies ``ExtensionClass`` to 4.3 and ``BTreeFolder2`` to 3.0.