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- Add support for Python 3.3.
- Replace deprecated ``zope.interface.classProvides`` usage with equivalent
``zope.interface.provider`` decorator.
- Replace deprecated ``zope.interface.implements`` usage with equivalent
``zope.interface.implementer`` decorator.
- Drop support for Python 2.4 and 2.5.
- When loading this package's ZCML configuration, make sure to configure
``zope.component`` first since we require part of its configuration.