Implement Soundcloud service

[Warrows]

No description provided.

[haschek]

Please provide links to API docs if you request a new service class and add a more detailed feature request (e.g. which informations/data from the API are most important).

[HDValentin]

Api Guide https://developers.soundcloud.com/docs/api/guide
Dev Site https://developers.soundcloud.com/

I think there are two different use cases:

1. Hearer only could display their X newest Likes
   https://soundcloud.com/valentinus-maximus/likes

2. Producer could display their newest X Tracks, Albums, Playlist, Repost, All Files
   https://soundcloud.com/auxlondon
   https://soundcloud.com/everythinggorillazp2

Possibly helful:
https://www.programmableweb.com/api/soundcloud
https://github.com/soundcloud/soundcloud-python

[Warrows]

@haschek you can assign this one to me. I am going to look into it.