message: Add constant for the number of unfed people
  I suppose this means the mStarveRate permits cannibalism.
diff: @@ -164,7 +164,8 @@ int Population::consumeFood(int food)
  return 0;
  }
  - int populationToKill = static_cast<int>((mPopulation.size() - populationFed) * mStarveRate);
  + const int populationUnfed = mPopulation.size() - populationFed;
  + const int populationToKill = static_cast<int>(populationUnfed * mStarveRate);
  if (mPopulation.size() == 1) { populationToKill = 1; }
  mDeathCount += populationToKill;
  