Overhauled project structure.

Changed everything. Refactored everything. Kept nothing from old codebase except that small snippet of request code in what is now the `/hello` route in `nhl/routes.js`.

New setup procedure:

1. Clone repo.
2. `cd angular-nhl/nhl/`
3. `npm install`
4. `bower install` if Bower is installed globally. Otherwise, do `node node_modules/bower/bin/bower install`.
5. `node server.js`

Usage:

1. Open browser.
2. Go to `127.0.0.1:8080/api/hello` to see raw returned data from external API
3. Go to `127.0.0.1:8080/#/hello` to see processed data.