We will need PyDict mode in the next patch to fix Map test on
py3_pickle3 and so that working with unpickled dictionaries is easy
independently from which Python version - py2 or py3 - they come.

PyDict mode patch: https://github.com/kisielk/og-rek/commit/3bf6c92d
		  (https://github.com/kisielk/og-rek/pull/75)

Whole set of brought changes:

	https://github.com/kisielk/og-rek/compare/b1bd3f2e3d5e...e691997e3596