- Replace the in-memory dataset with data loaded from the server (in the form of a static
  'phone.json' file to keep the tutorial backend agnostic):
  - The JSON data is loaded using the `$http` service.
- Demonstrate the use of `services` and `dependency injection` (DI):
  - `$http` is injected into the controller through DI.
  - Introduce DI annotation methods: `.$inject` and inline array

Closes #207