Products.pluginregistry

------------------

- Fix listPluginTypeInfo in Python 3.

----------------

- Add Python 3.5 and 3.6 compatibility.

- Require Zope 4.0b4 as minimum supported Zope version.

----------------

Breaking changes:

- Drop support for Python 2.6.

- Require Zope 4.0a3 as minimum supported Zope version.

----------------

- Fix usage of os.path.split(). Could result in Errors during import
on Windows.

----------------

- Change default encoding for importexport from None to utf-8.

------------------

- Improved test coverage.

- Removed dependency on ``zope.app.testing``.

- Dropped support for use with Zope < 2.12.

- Added a buildout for running tests.