created coup_nn class

can train and create an NN dump
can be called with Coup_NN.predict_duel(p1,p2)
cleaned up Coup_NN

now accepts arguments for training and has a standardized pickle dump
format

will generate training set and NN if absent when calling dependent
functions like predict_duel
Merge pull request #4 from hexparrot/wins_duels

Wins duels