==================
- Add support for PyPy, Python 2.7, and Python 3.
This requires the addition of the ``zodbpickle`` dependency, even on
Python 2.6.
- Fixed the ``--days`` argument to ``multi-zodb-gc`` with recent
versions of ``persistent``.
- The return values and arguments of the internal implementation
functions ``gc`` and ``gc_command`` have changed for compatibility
with Python 3. This will not impact users of the documented scripts
and is noted only for developers.