Zope-app-authentication

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

- Nothing changed yet.

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

- Drop test dependency on zope.app.zcmlfiles and zope.app.testing.

- Drop explicit dependency on ZODB3.

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

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

* Move concrete IAuthenticatorPlugin implementations to
zope.pluggableauth.plugins. Leave backwards compatibility imports.

* Use zope.formlib throughout to lift the dependency on zope.app.form. As it
turns out, zope.app.form is still a indirect test dependency though.

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

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

* Moved the following views from `zope.app.securitypolicy` here, to inverse
dependency between these two packages, as `zope.app.securitypolicy`
deprecated in ZTK 1.0:

- ``grant.html``
- ``AllRolePermissions.html``
- ``RolePermissions.html``
- ``RolesWithPermission.html``

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

* Using the new `principalfactories.zcml` file, from ``zope.pluggableauth``,
to avoid duplication errors, in the adapters registration.

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

* The Pluggable Authentication utility has been severed and released
in a standalone package: `zope.pluggableauth`. We are now using this
new package, providing backward compatibility imports to assure a
smooth transition.