set up rspec and creating classes

I've set up the rspec test paths successfully.
I'm now creating the necessary classes and testing them as I go. The
necessary classes are:
CodeMaker
CodeBreaker
CodeBoard
CodePegs
KeyPegs

I'm still trying to decide if I want a separate class for evaluating the
codes or if I should fold that function into the CodeMaker class. I'm
leaning toward a separate class for now.
CodeGuessEvaluator or something, maybe