Removed some backwards compatibility imports for zope.app.

We already require Plone 4.1.  The new locations are available there.
See also http://plone.org/documentation/manual/upgrade-guide/version/upgrading-plone-4.2-to-4.3/updating-package-dependencies
Remove old messageFactory BBB module
Removed BBB code for plone.app.folder.
Removed BBB code for old style Zope 2 interfaces.
Removed BBB code for checking Zope 2 interfaces.
Removed checks for Plone 4.0.
Removed old patch_publisher_exception_handling patch.