changed cross validation wrapper (#346)
changed cross validation wrapper (#346)

is supposed to return an answer when errT converges, not errV
used to return size of when err_val converges but is supposed to return the size with minimum err_val
aimacode/aima-python,jo-tez/aima-python,SnShine/aima-python,jo-tez/aima-python,Chipe1/aima-python,Chipe1/aima-python,SnShine/aima-python,aimacode/aima-python