Update xor-classfier.py

Change some parameters and the last line (the last line didnt work on both my windows and mac computers in the original version) 

result for my parameters:
Input:
[[ 0.  0.]
 [ 0.  1.]
 [ 1.  0.]
 [ 1.  1.]]
XOR output
[0 1 1 0]
NN XOR predictions
[[-0.01405924]
 [ 1.04721887]
 [ 1.040702  ]
 [ 0.00471972]]

result for previous parameters:
 Input:
[[ 0.  0.]
 [ 0.  1.]
 [ 1.  0.]
 [ 1.  1.]]
XOR output
[0 1 1 0]
NN XOR predictions
[[-0.90128537]
 [-0.86696363]
 [-0.89465342]
 [-0.85937567]]