[Checkins] [zopefoundation/z3c.checkversions] fbc4bd: Improve documentation for buildout support

[Jürgen Gmach]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/z3c.checkversions
  Commit: fbc4bd98808d3eb9549acbd934b3a6f83b0af136
      https://github.com/zopefoundation/z3c.checkversions/commit/fbc4bd98808d3eb9549acbd934b3a6f83b0af136
  Author: Jürgen Gmach <juergen.gmach at googlemail.com>
  Date:   2019-10-13 (Sun, 13 Oct 2019)

  Changed paths:
    M CHANGES.rst
    M README.rst
    M src/z3c/checkversions/buildout.py

  Log Message:
  -----------
  Improve documentation for buildout support

... both for the README and the exception message, which gets raised
when zc.buildout is not installed.

This closes #15

modified:   CHANGES.rst
modified:   README.rst
modified:   src/z3c/checkversions/buildout.py