python-pyjwt: new package

PyJWT is a Python library which allows you to encode and decode
JSON Web Tokens (JWT). JWT is an open, industry-standard (RFC 7519)
for representing claims securely between two parties.

https://github.com/jpadilla/pyjwt



Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
[Arnout: bump to 1.7.1]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>