[Fix] Experiment: trainNeuralNetwork().
      Save the 'best net' instead of 'this.net'. When Backpropagation
      finishes may be differences between them, since 'this.net' is
      updated only at each strip whereas 'this.net' changes at every epoch
Merge branch 'master' of github.com:marcosdg/NeuralNet

Conflicts:
	NeuralNet/bin/core/learning/Backpropagation.class