Merge pull request #1 from nicholsn/cmaumet/csv2owl

fix: add '#' to iao ns and fix prov api code to work with `rdf` stable branch
Add prov:SoftwareAgent rdfs:subClassOf prov:Agent
Remove rdfs:subClassOf prov:Attribute
SPM and FSL are SoftwareAgent
atCoordinateSpace is ObjectProperty
atCoordinateSpace is an ObjectProperty
Update ontology
rdfs:range and refs:domain must map to know classes

Unknown types are copied as comments
(non)stationaryRandomField are classes
(non)stationaryRandomField are classes
rm: declating each attribute is a rdfs:property
fix: use the prov qname for XSD not rdflib