Add new port audio/py-soundscrape

SoundScrape makes it super easy to download artists from SoundCloud, Bandcamp
and MixCloud. It automatically creates ID3 tags as well (including album art),
which is handy.

WWW: https://github.com/Miserlou/SoundScrape

Reviewed by: koobs
Differential Revision: https://reviews.freebsd.org/D11049