def add_score(score)
      @total_score += score.value
      @scores[score.key] = score
      if @top_score_key.nil? || @scores[@top_score_key].value < score.value
        @top_score_key = score.key
      end
    end
def add_score(score)
      @total_score += score.value
      @scores[score.key] = score
      if @top_score_key.nil? || @scores[@top_score_key].value < score.value
        @top_score_key = score.key
      end
    end
Method for adding new score to result

 ==== Parameters

 * +score+ - OmniCat::Score