Fix RDFS namespace declaration.
Fix RDFS namespace declaration.

Thanks tobyink

Br3nda/laconica,gnusocial/mainline,zh/statusnet,csarven/statusnet,Piratas/tortuga,zcopley/zcopleys-statusnet-clone,UngPirat/freesocial,minmb/statusnet,sikevux/bsk-social,shashi/StatusNet,shashi/StatusNet,chimo/social,eXcomm/gnu-social,faulteh/gnu-social,faulteh/gnu-social,xebia/statusnet-oauth2,bankonme/gnu-social,faulteh/gnu-social,furtherfield/gnu-social,Piratas/tortuga,UngPirat/freesocial,chimo/social,foocorp/gnu-social,gnusocial/mainline,gnusocial/mainline,zcopley/StatusNet,sikevux/bsk-social,foocorp/gnu-social,eXcomm/gnu-social,d3vgru/StatusNet,Br3nda/laconica,charlycoste/StatusNet,charnimda/lgbtpzn-social,charnimda/lgbtpzn-social,faulteh/gnu-social,d3vgru/StatusNet,Piratas/tortuga,eXcomm/gnu-social,d3vgru/StatusNet,xebia/statusnet-oauth2,znarf/statusnet-ladistribution,zcopley/zcopleys-statusnet-clone,furtherfield/gnu-social,minmb/statusnet,charnimda/lgbtpzn-social,zcopley/zcopleys-statusnet-clone,studio666/gnu-social,gnusocial/mainline,brion/StatusNet,foocorp/gnu-social,znarf/statusnet-ladistribution,znarf/statusnet-ladistribution,bankonme/gnu-social,xebia/statusnet-oauth2,sikevux/bsk-social,bankonme/gnu-social,meitar/laconica,brion/StatusNet,zcopley/StatusNet,csarven/statusnet,chimo/social,eXcomm/gnu-social,zh/statusnet,minmb/statusnet,shashi/StatusNet,furtherfield/gnu-social,studio666/gnu-social,sikevux/bsk-social,meitar/laconica,Piratas/tortuga,zcopley/StatusNet,charlycoste/StatusNet,bankonme/gnu-social,meitar/laconica,csarven/statusnet,charlycoste/StatusNet,furtherfield/gnu-social,studio666/gnu-social,Br3nda/laconica,csarven/statusnet,UngPirat/freesocial,zh/statusnet,studio666/gnu-social,brion/StatusNet