owl:import URIs are broken in examples #44
Description
E.g. this example
<http://inspire.ec.europa.eu/ont/cp> owl:imports <https://github.com/inspire-eu-rdf/inspire-rdf-vocabularies/blob/master/ad/ad.ttl> , ...
would never work, because https://github.com/inspire-eu-rdf/inspire-rdf-vocabularies/blob/master/ad/ad.ttl resolves to a GitHub HTML page and not RDF.
A proper solution would of course be to find a more persistent URI, e.g. on purl.org or europa.eu or w3.org, and redirect to files on GitHub behind the scenes.
But if we want to continue linking directly to GitHub, it should be the "raw" file URI: https://raw.githubusercontent.com/inspire-eu-rdf/inspire-rdf-vocabularies/master/ad/ad.ttl