==================
- 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.
- PageTemplate.pt_render() has a new argument, ``check_macro_expansion``,
defaulting to True.
- PageTemplateTracebackSupplement passes ``check_macro_expansion=False``, to
avoid LP732972.