Coding dojo: Yahtzee Kata Round II

There are new requirements (http://bit.ly/1oiKzTB). Let's see how our decisions receive them.

Work a bit through the kata before the session and write down doubts and things you'd like to debate.

We'll start from the solution to the first round we did last week. If you didn't have time to finish it, do it during the week or use my solution (Ruby) or Ángel's one (Java).

Post your solution in other languages here so we have other starting points for this round of the kata.