message: added TorrentStats#last method
diff: @@ -50,6 +50,10 @@ public final class TorrentStats {
  }
  }
  + public long last(SeriesMetric metric) {
  + return series(metric).last();
  + }
  +
  public void update(TorrentStatus status) {
  if (!ih.equals(status.infoHash())) {
  return; // not for us
  