Classes clean up

ToDo:

• Add mwo:Documentation as subclass of foaf:Document

Remove
skos:Concept
c-o:conferenceSeries
c-o:EventSeries
c-o:TutorialSeries
c-o:WorkshopSeries
frapo:grant
frapo:Supplier
person (superclass of foaf:person, http://www.w3.org/2000/10/swap/pim/contact#Person)
person (superclass of foaf:person, http://xmlns.com/wordnet/1.6/Person)
project (http://xmlns.com/wordnet/1.6/Project,http://xmlns.com/wordnet/1.6/Project)
rdfs:Literal (rdfs:Literal)

Import directly (no superclasses?)
geo:spatialthing
frapo:service
fabio:review
fabio:Work
vcard:individual
schema:product
schema:ComputerLanguage
schema:service
schema:person
schema:Organization
dcterms:bibliographicresource
dcterms:LicenseDocument