Added hello world.

This branch will be based on master and will contain all the
additional stuff needed for heroku (such as a gunicorn, a web
server). I'll integrate the real app step by step.
notes
Modified db connectors for Heroku-Postgres
seaice.py: don't set permissions
ice ready to deploy
dome stuff
TODOs in README
ice --config: default to Heroku-Postgres database
clean up
Modified db connectors for Heroku-Postgres
seaice.py: don't set permissions
ice ready to deploy
TODOs in README
Removed localhost keys
Added package requirements