Added SurveyRecordModel.
Lennard: On top of the orginial patch I've added several comments to the fields and two TODO's for further subclassing.
Patch by: James Levy, Daniel Diniz, Lennard de Rijk
Reviewed by: Lennard de Rijk
""">>> from django.contrib.sites.models import Site>>> from django.conf import settings>>> Site(id=settings.SITE_ID, domain="example.com", name="example.com").save()>>> # Make sure that get_current() does not return a deleted Site object.>>> s = Site.objects.get_current()>>> isinstance(s, Site)True>>> s.delete()>>> Site.objects.get_current()Traceback (most recent call last):...DoesNotExist: Site matching query does not exist."""