automate Django setup

[daviddahl]

We should write a script that completely automates the Django setup by:

• [ ] checking for virtualenv and installing if need be
• [ ] create a virtualenv in ~/.env-pagelab || <path>
• [ ] install requirements.txt
• [ ] prompt user for DJANGO_DB_NAME, DJANGO_DB_PASSWORD, etc
• [ ] write config in settings_local.py
• [ ] provide a start script that does source ~/.env-pagelab/bin/activate first
• [ ] figure out how best to talk to postgresql
• [ ] runs ./manage.py migrate
• [ ] runs ./manage.py loaddata reports/fixtures/$NEW_FIXTURE_WITH_24_URLS_OR_SOMETHING.json
• [ ] runs ./manage.py collectstatic
• [ ] generate gunicorn start script for supervisorctl
• [ ] generate 'httpd' config
• [ ] create a docker image that knows how to consume all of these artifacts