ports/176559: net-mgmt/py-pyang: Update to version 1.3

[edwin at FreeBSD.org]

Synopsis: net-mgmt/py-pyang: Update to version 1.3

Responsible-Changed-From-To: freebsd-ports-bugs->araujo
Responsible-Changed-By: edwin
Responsible-Changed-When: Thu Feb 28 18:13:18 UTC 2013
Responsible-Changed-Why: 
araujo@ wants this submitter's PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=176559