[Checkins] [zopefoundation/zope.index] 13af10: add entry on None values in field index to CHANGES

[GitHub]

  Branch: refs/heads/none_value_field
  Home:   https://github.com/zopefoundation/zope.index
  Commit: 13af105fd9912ca0d1328f38d01f4fb1ee2e523a
      https://github.com/zopefoundation/zope.index/commit/13af105fd9912ca0d1328f38d01f4fb1ee2e523a
  Author: Forest Gregg <fgregg at uchicago.edu>
  Date:   2017-04-21 (Fri, 21 Apr 2017)

  Changed paths:
    M CHANGES.rst

  Log Message:
  -----------
  add entry on None values in field index to CHANGES