Zope-app-generations

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- Moved ``getRootFolder`` utility method from
``zope.app.zopeappgenerations`` to ``zope.app.generations.utility``.

- Removed not necessary install dependency on ``zope.app.testing``.

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- Provide more logging output for the various stages and actions of evolving a
database.

- Fixed bug: A failing last generation would allow starting an app server
without having evolved to the minimum generation.

- Substitute zope.app.zapi by direct calls to its wrapped apis. See
bug 219302.

- Corrected author email and home page address.

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- Resolve ``ZopeSecurityPolicy`` deprecation warning.

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- Initial release independent of the main Zope tree.