implement users CRUD using DRF
Some better input validation for signup
Use DRF api_view decorator for api views
disable CSRF middleware, require token for auth
add views for organization listing, getting, editing
minor, comment
make UserOrganization roles unique for user + organization
views to view, edit, add users in an organization
wrap permission checking into separate permission classes
pep8 linting for apps/schools/api_views/
merge develop
pep8 linting for apps/schools/models/
pep8 validate apps/common (except for models.py)
pep8 linting of apps/users/
pep8 linting for app/schools/models/__init__.py