Make my ChangeList sub-class compatibile with Django 1.3

Make my ChangeList sub-class compatibile with Django 1.3

Django 1.3's django.contrib.admin.view.main.ChangeList
class takes one fewer parameter than the 1.4 version, as
does the get_query_set function.

I solved this by testing the django.VERSION and adding
the extra paramemeter to a dictionary and calling with
**kwarg expansion.

Yes it is dirty.