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
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage during test execution.
It uses the code analysis tools and tracing hooks provided in the Python standard
library to determine which lines are executable, and which have been executed.
For more information, see http://nedbatchelder.com/code/modules/coverage.html