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- The publisher and injector have been refactored into
``PublisherTween`` and a ``Publisher``, and an ``InjectorTween`` and
an ``Injector``. The Tween versions are the ones intended for use by
web frameworks that already use WebOb (such as Morepath and Pyramid)
as an alternative to using WSGI-based integration.
The WSGI-based integration has remained unchanged; you can still use
``bower.wrap`` (or ``bower.injector`` and ``bower.publisher``).