DOAP RDF plugin

This plugin will provide content-negociation means to export RDF+XML DOAP profiles for projects on /projects URLs.

For instance, one may try :
 curl -k -H 'Accept: application/rdf+xml' https://myforge.example.com/projects/aproject/

More details about DOAP available from https://github.com/edumbill/doap/wiki

This plugin has been initiated as part of the COCLICO project.
