Merge pull request #187 from josiane/patch-1

[README] Fix broken link

Author: josianebezerra

README.md

@@ -6,7 +6,7 @@ The Spotfy App Remote framework allows third parties to interact with the Spotif
 ![TCP Connection](img/architecture.png)
 
 ## Background
-Spotify App Remote is a wrapper library around [Inter-App Protocol](https://developer.spotify.com/inter-app-protocol/) (password: PlayEverywhere), a protocol for remote communication with Spotify mobile applications that we use for integration with hardware. The Spotify App Remote API allows client applications to interact with the Spotify app running on the same device. The capabilities of the API includes both subscribing to events and invocation of commands.
+Spotify App Remote is a wrapper library around [Inter-App Protocol](https://developer.spotify.com/private-documentation/inter_app-protocol), a protocol for remote communication with Spotify mobile applications that we use for integration with hardware. The Spotify App Remote API allows client applications to interact with the Spotify app running on the same device. The capabilities of the API includes both subscribing to events and invocation of commands.
 
 The Spotify App Remote library is lightweight - it only contains logic for connection and transport, and a wrapper of Inter-App Protocol. All the heavy lifting of playback is offloaded to the Spotify application (applying the same rules, networking, offline caching, audio focus and player logic etc). That way, we don’t need to maintain two player stacks and know that our users will have the same user experience as if using the Spotify iOS app.