Creates initial south migrations for org.
Updates circle.yml to not flake8 south_migrations.
Fixes flake8 invocation for circleci.
Adds south migrations to add uid fields to orgs.
Adds django-uuidfield to requirements.txt.
Hopefully made initial migration AUTH_USER_MODEL agnostic.
Fixes second migration to work with custom AUTH_USER_MODEL.
Updates readme with instructions for running migrations.
Merge pull request #20 from buildingenergy/feature/has-migrations

Feature/has migrations