message: added IntSeries#last method
diff: @@ -79,6 +79,16 @@ public final class IntSeries {
  return buffer[(head + index) % size];
  }
  + /**
  + * This method will always returns a value, if the series is empty
  + * {@code 0} is returned.
  + *
  + * @return the last value in the series
  + */
  + public long last() {
  + return end != 0 ? buffer[end] : 0;
  + }
  +
  public int size() {
  return size;
  }
  