A simple app consuming Spotify web REST API https://developer.spotify.com/web-api/
- https://github.com/JakeWharton/butterknife
- https://github.com/bumptech/glide
- https://github.com/square/retrofit
- https://github.com/google/gson
- https://github.com/ReactiveX/RxAndroid
- MVP (Model View Presenter)