Add basic auth models and views.

core/api/auth.py

core/api/password.py

core/apps.py

core/models/profile.py

core/models/utils.py

core/serializers/__init__.py

core/serializers/login.py

core/serializers/password.py

core/serializers/profile.py

core/serializers/register.py

core/serializers/user.py

core/signals.py

core/urls.py

docs/api.md

ece651_backend/settings.py

ece651_backend/urls.py

requirements.txt

templates/user_reset_password.html

templates/user_reset_password.txt