Added the Procfile for heroku
added scripts to the package.json file
added angular-sanitize to bower.json
unhid server/config.js

By making use of environment variables I can now safely push the config
file without pushing the actual config data.
PageController tweaked to only PUT the content

It used to put the _id as well. That was a bad choice because with
I had issues with my hosted mongodb service (wouldn't let me PUT because
I was trying to modify the _id field).
added relevant files from bower_components

So that I can push the whole project to heroku
Merge branch 'heroku'

Tweaked things and config so that I can push directly to heroku
without exposing the config sensitive data. The relevant bower_components
were also added for the same reason.