Change key_name module usage to path_linkname module (fix to previous commit). Add comments about urls. Add Sponsor views urls for upcoming Sponsor views modules. Patch by: Pawel Solyga Review by: to-be-reviewed

from query import *
from subqueries import *
from where import AND, OR
from datastructures import EmptyResultSet

__all__ = ['Query', 'AND', 'OR', 'EmptyResultSet']