[Checkins] [zopefoundation/zodbpickle] 20ed9f: Add an appveyor.yml

[GitHub]

  Branch: refs/heads/appveyor
  Home:   https://github.com/zopefoundation/zodbpickle
  Commit: 20ed9f12e8c343712d466b4e277d8e09cd764e11
      https://github.com/zopefoundation/zodbpickle/commit/20ed9f12e8c343712d466b4e277d8e09cd764e11
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2017-09-21 (Thu, 21 Sep 2017)

  Changed paths:
    A appveyor.yml

  Log Message:
  -----------
  Add an appveyor.yml

Closes #23.