Add basic Sponsors List, Create New Sponsor, Sponsor Public Profile views. Change all properties in Group model as required for now. Remaining TODO: write validation functions for Sponsor edit and create form fields that need additional validation (like address, phone number format). Patch by: Pawel Solyga Review by: to-be-reviewed

class_prepared = object()

pre_init= object()
post_init = object()

pre_save = object()
post_save = object()

pre_delete = object()
post_delete = object()

post_syncdb = object()