Zope-app-generations

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- Nothing changed yet.

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- Add support for Python 3.4, 3.5, 3.6 and PyPy.

- Fix the ``evolve`` view to use independent transactions instead of
committing or aborting the thread-local current transaction.

- Drop dependency on ``zope.app.renderer``.

- Drop test dependency on ``zope.app.testing``, ``zope.app.zcmlfiles``
and others.

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- Replaced an undeclared test dependency on ``zope.app.authentication`` with
``zope.password``.

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- Depends now on the extracted ``zope.generations``.

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- ``zope.app.generations`` depended on ``zope.app.applicationcontrol`` but
did not declare it. Modernized dependecy to ``zope.applicationcontrol`` as
the needed interface has been moved there.

- Using python's ``doctest`` module instead of deprecated
``zope.testing.doctest[unit]``.

- Replaced a testing dependency on ``zope.app.securitypolicy`` with one on
``zope.securitypolicy``.

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- Depend on new ``zope.processlifetime`` interfaces instead of using
BBB imports from ``zope.app.appsetup``.

- Fix ftesting.zcml due to ``zope.securitypolicy`` update.

- Fix tests using a newer zope.publisher that requires zope.login.