Implemented Spotify Authentication with sample UserProfile request
Created basic tests for Auth/Login action
Created tests for Auth/GetAuthenticationToken and improved error handling
Implemented Acronym Playlist generation coupled with the creation of SpotifyIntegrationModel and the use of Ninject for DI for better testability
Implemented default track selection for letters that have no corresponding track on any playlist, and sorted tracks so that repetition occurs as little as possible
Changed PlaylistController to use ISpotifyIntegrationModel instead of concrete type
Created unit tests for PlaylistController
Removed unused views and beautified the remaining ones