Fix not working delete Sponsor functionality after recent commit. Add delete() method to Base class. Make soc.views.site.sponsor.delete() request handler use this method.
Patch by: Pawel Solyga
Review by: to-be-reviewed
# coding: utf-8
r"""
>>> from django.contrib.comments.models import Comment
>>> from django.contrib.auth.models import User
>>> u = User.objects.create_user('commenttestuser', 'commenttest@example.com', 'testpw')
>>> c = Comment(user=u, comment=u'\xe2')
>>> c
<Comment: commenttestuser: â...>
>>> print c
commenttestuser: â...
"""