Fix for handling dates that may or may not be timezone-aware
Fix for handling dates that may or may not be timezone-aware

I'm not entirely certain any of this code is a good idea,
but at least we're now consistent about how we handle
timestamps.

Nikola-K/django-recurrence,linux2400/django-recurrence,FrankSalad/django-recurrence,django-recurrence/django-recurrence,linux2400/django-recurrence,Nikola-K/django-recurrence,django-recurrence/django-recurrence,FrankSalad/django-recurrence