Make first version of cheater and loser AI

@gabebw @steiner I did the next part of the rock-paper-scissors project. still working on hotels
This can be `MOVES_THAT_WILL_LOSE_TO = MOVES_THAT_WILL_BEAT.invert`.

See Hash#invert: http://www.ruby-doc.org/core-2.1.2/Hash.html#method-i-invert