Add an argument that allows specifying initial hand, such as '0134576' to play without the spy.
Start on Kirkby AI, a monte carlo tree search AI based on http://mcts.ai/code/python.html
AI actually works now, just need to massage it into a brain function
Add function to compute opponent's hand from game state
Calculate the hand correctly
Make red's hand actually update
Function no longer necessary now that Kirkby's brain is compatible with brave_rats