[patch] Allow positional args in get_object_or_404

[Joeboy]

presently, get_object_or_404 only accepts keyword arguments, so this kind of query:

r = get_object_or_404( Resource, Q(pk=resource_id) & (Q(expiry_date__isnull=True) | Q(expiry_date__gt=datetime.now())) )

fails. Patch appears to fix it. (thanks for Heimy for irc assistance).

[Jacob]

(In [3014]) Fixed #2048 - get_object_or_404 now allows *args as well. Thanks, Joeboy

[Jacob]

(In [3015]) Added *args to get_list_or_404, too (refs #2048).