----------------
- Add python 3 support.
[rnix, 2017-06-24]
- Add ``keys`` to ``OOBTodict`` and accept any number of ``*args`` and ``**kw``
to match expected contract by ``OOBTree`` and Fix tests with ZODB 5.
[rnix, 2017-06-22]
- Add ``__nonzero__`` and ``__bool__`` to ``OOBTodict`` in order to make it
work properly with ZODB 5.
[rnix, 2017-06-22]
- Use ``property`` and ``property.setter`` for ``OOBTodict.lh`` and
``OOBTodict.lt``.
[rnix, 2017-06-22]