Check theme first for CSS files, then use the non-theme path.
Check theme first for CSS files, then use the non-theme path.

Fixes CSS links in plugins

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