Added SoundCloud API

Author: gitoct

README.md

@@ -500,6 +500,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Musixmatch](https://developer.musixmatch.com/) | Music | `apiKey` | Yes | Unknown |
 | [Songkick](https://www.songkick.com/developer/) | Music Events | `OAuth` | Yes | Unknown |
 | [Songsterr](https://www.songsterr.com/a/wa/api/) | Provides guitar, bass and drums tabs and chords | No | Yes | Unknown |
+| [SoundCloud](https://developers.soundcloud.com/) | Allow users to upload and share sounds | `OAuth` | Yes | Unknown |
 | [Spotify](https://beta.developer.spotify.com/documentation/web-api/) | View Spotify music catalog, manage users' libraries, get recommendations and more | `OAuth` | Yes | Unknown |
 | [TasteDive](https://tastedive.com/read/api) | Similar artist API (also works for movies and TV shows) | `apiKey` | Yes | Unknown |
 | [TheAudioDB](http://www.theaudiodb.com) | Music | `apiKey` | No | Unknown |