make batch processing possible, so I do not need to wait for all errors to be fetched

[grosser]

   STDOUT.sync = true
    Hoptoad::Notice.find_all_by_error_id(error_id) do |batch|
      batch.each do |notice|
        result = system "curl --silent '#{notice.request.url}' > /dev/null"
        print (result ? '.' : 'F')
      end
    end