Merge pull request #5 from OpenTechFund/feature/20-user-accounts-and-groups

opentech/settings/base.py

opentech/urls.py

opentech/users/__init__.py

opentech/users/groups.py

opentech/users/migrations/0001_initial.py

opentech/users/migrations/0002_initial_data.py

opentech/users/migrations/__init__.py

opentech/users/models.py

opentech/users/templates/users/login.html

opentech/users/urls.py

opentech/users/views.py