add an index for site tags
add an index for site tags

faulteh/gnu-social,furtherfield/gnu-social,bankonme/gnu-social,eXcomm/gnu-social,faulteh/gnu-social,chimo/social,studio666/gnu-social,charnimda/lgbtpzn-social,Piratas/tortuga,furtherfield/gnu-social,sikevux/bsk-social,d3vgru/StatusNet,foocorp/gnu-social,d3vgru/StatusNet,bankonme/gnu-social,gnusocial/mainline,faulteh/gnu-social,charnimda/lgbtpzn-social,minmb/statusnet,bankonme/gnu-social,xebia/statusnet-oauth2,xebia/statusnet-oauth2,chimo/social,gnusocial/mainline,charnimda/lgbtpzn-social,faulteh/gnu-social,sikevux/bsk-social,charlycoste/StatusNet,studio666/gnu-social,eXcomm/gnu-social,charlycoste/StatusNet,UngPirat/freesocial,studio666/gnu-social,eXcomm/gnu-social,zcopley/StatusNet,UngPirat/freesocial,csarven/statusnet,foocorp/gnu-social,eXcomm/gnu-social,UngPirat/freesocial,xebia/statusnet-oauth2,zcopley/StatusNet,foocorp/gnu-social,Piratas/tortuga,chimo/social,csarven/statusnet,furtherfield/gnu-social,minmb/statusnet,csarven/statusnet,minmb/statusnet,zcopley/StatusNet,gnusocial/mainline,gnusocial/mainline,csarven/statusnet,sikevux/bsk-social,charlycoste/StatusNet,sikevux/bsk-social,studio666/gnu-social,furtherfield/gnu-social,Piratas/tortuga,bankonme/gnu-social,Piratas/tortuga,d3vgru/StatusNet