[Checkins] [zopefoundation/ZConfig] 520ed9: Support schemas in packages in the Sphinx extension.

[Jason Madden]

  Branch: refs/heads/issue59
  Home:   https://github.com/zopefoundation/ZConfig
  Commit: 520ed9cd25b481d05b576aa8e17ba11fce41ad99
      https://github.com/zopefoundation/ZConfig/commit/520ed9cd25b481d05b576aa8e17ba11fce41ad99
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2019-05-03 (Fri, 03 May 2019)

  Changed paths:
    M .travis.yml
    M CHANGES.rst
    M ZConfig/_schema_utils.py
    M ZConfig/sphinx.py
    A ZConfig/tests/sphinx_test_schema.xml
    M ZConfig/tests/test_schema2html.py
    M doc/documenting-components.rst

  Log Message:
  -----------
  Support schemas in packages in the Sphinx extension.

Fixes #59