Added real content negotiation
Added real content negotiation

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