Support datapackage identifier spec

[roll]

Overview

This issue is not a part of the first iteration of work and created for a future implementation if possible

Specification - https://frictionlessdata.io/specs/data-package-identifier/

[fils]

Is this URL resource down? http://dataprotocols.org/data-package-identifier/

[roll]

@fils
Thanks. I've updated the link - https://frictionlessdata.io/specs/data-package-identifier/