Spotify-onthego

Introduce interactive mode for Youtube result selection

- Skip copyrighted videos
- Fix unicode argument parsing in python 3

v1 release! `spotify-onthego` is now compatible with Python 3+.

Older

- 2016-07-09: Add playlist name wildcard matching
- 2016-04-17: - Add album art to the mp3 file ID3 tags (contribution by xabixab)
- 2016-03-15: It is now possible to download the tracks from "Your Music > Songs"! See below for details.