def library_facet(library, current_libraries, facet)
    string = ''
    current = true if current_libraries.include?(library.name)
    string << "<strong>" if current
    string << link_to("#{library.display_name.localize} (" + facet.count.to_s + ")", url_for(params.merge(:page => nil, :library => (current_libraries << library.name).uniq.join(' '), :view => nil)))