function scoreForKeyword(keyword, providedScore) {
    // manual scores always win over common keywords
    // so you can force a score of 1 if you really insist
    if (providedScore) {
      return Number(providedScore);
    }

    return commonKeyword(keyword) ? 0 : 1;
  }
Returns the proper score for a given keyword

Also takes into account comment keywords, which will be scored 0 UNLESS
another score has been manually assigned.
@param {string} keyword
@param {string} [providedScore]