Fix missing import identified by pylint.
************* Module app.soc.views.helper.responses
E0602:187:getToSLink: Undefined variable 'db'
Patch by: Todd Larsen
Review by: to-be-reviewed
"""Multi-consumer multi-producer dispatching mechanism
Originally based on pydispatch (BSD) http://pypi.python.org/pypi/PyDispatcher/2.0.1
See license.txt for original license.
Heavily modified for Django's purposes.
"""
from django.dispatch.dispatcher import Signal