Take advantage of the Model inheritance provided by polymodel.PolyModel to
have Club, School, Sponsor, and Organization actually inherit from the Group
Model class, rather than being composed via ReferenceProperties.
Patch by: Todd Larsen
Review by: Pawel Solyga, Sverre Rabbelier, Augie Fackler
Review URL: http://codereviews.googleopensourceprograms.com/606
from django.db.backends.dummy.base import complain
get_table_list = complain
get_table_description = complain
get_relations = complain
get_indexes = complain
DATA_TYPES_REVERSE = {}