New port: devel/py-oslo.serialization

The oslo.serialization library provides support for representing objects
in transmittable and storable formats, such as Base64, JSON and MessagePack.

WWW: http://docs.openstack.org/developer/oslo.serialization/

Differential Revision: D4903
Submitted by: Davide D'Amico <dave@gufi.org>
Reviewed by: koobs