Fix RecurrenceRuleField - rewritten _has_changed method. See #1006
Fix RecurrenceRuleField - rewritten _has_changed method.
See #1006

ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/icekit-events,ic-labs/icekit-events,ic-labs/django-icekit,ic-labs/icekit-events