Step 2 of moving to new seeding model.
Create Seeder class, which abstracts some seeding.
Move user to Seeder class, and make new OrganizationSeeder class.
If people like this, I'll finish the rest soon.
Patch by: Dan Bentley
"""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