Heroku deploy config

- Adds Procfile.
- Adds ```config-heroku``` and heroku.sample.json so we don't have to do this ```config.instagram.cliend_id || process.env.INSTAGRAM_CLIENT_ID```.
- Writes css in stylus. Are you gonna use that? does it matter? i have no preference.
We are live. http://noded3.herokuapp.com/