Added all Spotify stuff, including node packages. Searches for album art...

... URL as well

Hi All,

Spotify node server is up and running, and it will return the album art URL as well, so we should be able to use that pretty easily.

Note that this is a huge pull. This is because I am packaging up all the node packages into the repo to make it a bit easier for us. You should be able to "brew install node", pull this repo down, run "node node_server.js", then "rackup", then hit localhost:9292/spotify?q=radiohead to see it in action.

Let me know if those steps don't work and we can figure it out. Tomorrow would be a good day to figure out either AJAX or how to consume this JSON from the frontend to display it correctly!