Configure for local development and heroku deploy

Hi Tom, we're using the express prototype at the moment on the passports exemplar. I'm using it in a sort of dumb way at the moment (as I just copied the code) from your repo :) But in order to contribute back I've forked as well and made some changes which makes it a bit easier on heroku as grunt, nodemon etc is not required on heroku. There appears to be a huge amount of changes as I removed the node_modules (as they can be retrieved by npm locally and for free automatically on heroku). The changes that are of interest really are in the package.json and Procfile.

Cheers Adam.