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* Drop official support for Django 1.4, Django 1.5, Django 1.6 and
Python 2.6 (no changes have been made to deliberately break older
versions, but older versions will not be tested going forward);
* Add official support for Django 1.8 and Django 1.9 62;
* Fix for a bug in ``Rule`` creation where the weekday parameter is
an instance of ``Weekday`` rather than an integer 57.