def modification_time(path)
      is_uri = URI.parse(path)
      if !is_uri.host.nil?
        return web_modification_time is_uri
      end
      File.new(path).mtime
    end
def modification_time(path)
      is_uri = URI.parse(path)
      if !is_uri.host.nil?
        return web_modification_time is_uri
      end
      File.new(path).mtime
    end
Dispatches to web_modification_time if we're dealing with a url, otherwise just stats the
 local file.