importing again SAREF. Closes #6

ontology/saref4inma.ttl

@@ -11,6 +11,7 @@
 
 <https://saref.etsi.org/saref4inma/> rdf:type owl:Ontology ;
                                       owl:versionIRI <https://saref.etsi.org/saref4inma/v2.1.1/> ;
+                                      owl:imports <https://saref.etsi.org/core/v3.2.1/> ;
                                       <http://purl.org/dc/terms/contributor> <http://purl.org/net/mpoveda> ,
                                                                              <https://www.linkedin.com/in/matthijs-punter-0799902> ;
                                       <http://purl.org/dc/terms/created> "2015-03-29"^^xsd:date ;