Implemented handling of FOAF records in publisher and contributor
Implemented handling of FOAF records in publisher and contributor

- Now copies element's @rdf:resource property to text
- Extracted person_attrs() to top level
- Defined new FOAF handler functions
- dc_metadata_reader() mapping now also support callbacks

kata-csc/ckanext-oaipmh,kata-csc/ckanext-oaipmh,kata-csc/ckanext-oaipmh