# File lib/webby/resources.rb, line 105
    def dirname( filename )
      rgxp = %r/\A(?:#{::Webby.site.content_dir}|#{::Webby.site.layout_dir})\//o
      dirname = ::File.dirname(filename)
      dirname << '/' if dirname.index(?/) == nil
      dirname.sub(rgxp, '')
    end