[Checkins] [zopefoundation/z3c.relationfield] cdf764: Provide IRelationBrokenEvent to be able to disting...

[Nathan Van Gheem]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/z3c.relationfield
  Commit: cdf764e1afb2a7cc0a67d572b7da828a11006700
      https://github.com/zopefoundation/z3c.relationfield/commit/cdf764e1afb2a7cc0a67d572b7da828a11006700
  Author: Nathan Van Gheem <vangheem at gmail.com>
  Date:   2019-05-21 (Tue, 21 May 2019)

  Changed paths:
    M CHANGES.rst
    M src/z3c/relationfield/event.py
    M src/z3c/relationfield/interfaces.py

  Log Message:
  -----------
  Provide IRelationBrokenEvent to be able to distinguish the event when it is broken (#18)