Add mappings to FOAF, PROV, PAV

[stain]

When looking at JERM I see that it defines many terms in its own namespace, even if they are available in commonly used ontologies, e.g.

jerm:Person -> foaf:Person, prov:Person
jerm:Investigation -> isaterms:investigation
jerm:hasCreator -> pav:createdBy / pav:authoredBy, dcterms:creator, prov:wasAttributedTo
jerm:hasContributor -> pav:contributedBy, dcterms:contributor, prov:wasAttributedTo
jerm:hasFormat -> dcterms:hasFormat
jerm:isFormatOf -> dcterms:isFormatOf
jerm:hasPart -> dcterms:hasPart

While I might disagree with redefining all of these in your own namespace I can see why if you want to be more specific in their domain and ranges. I would at least hope for a mapping to the more common ontologies. :)

For details:

http://xmlns.com/foaf/spec/
http://purl.org/pav/html and http://dx.doi.org/10.1186/2041-1480-4-37
http://www.w3.org/TR/prov-o/
http://purl.org/dc/terms/
http://isa-tools.github.io/linkedISA/ and https://github.com/ISA-tools/linkedISA-ontologies/blob/master/isaterms.owl

[stuzart]

Thanks Stian. We are currently working on a new version of the ontology, and these kinds of mappings are something we plan to incorporate.

[stain]

Thanks for merging #4 - remaining would be ISATerm #5 and dcterms - I'll have a go on dcterms.