Stop requiring root access to develop the site

Add a port option to run_server.py and update README.md to have the
minimal required step to get the site running.
Merge pull request #7 from armooo/non-root

Stop requiring root access to develop the site
Add Flask-Migrate support

Add Flask-Migrate to manage database schema changes
Merge pull request #2 from armooo/flask-migrate

Flask migrate