Changed rdflib dependency to npm version
Changed rdflib dependency to npm version

evWork/nds-server,timbl/ldnode,nicola/ldnode,evWork/nds-server,evWork/nds-server,dmitrizagidulin/solid-server-unstable,deiu/ldnode,linkeddata/ldnode,martinmr/node-ldp-httpd,martinmr/node-ldp-httpd,linkeddata/ldnode,dmitrizagidulin/solid-server-unstable,deiu/ldnode,nicola/ldnode,timbl/ldnode,dmitrizagidulin/solid-server-unstable