Added NN forward propagation

Added Neural Network forward propagation engine. The main code is user
classifier/predic_NN.py. Added the framework around predict (learning
machine) for future instances.

The NN is 3 layers, input, hidden, and

Input layer uses 320x240 image
hidden layer is 50
output is 2 ( vectors |0> or |1> ) for closed or opened

Also added hooks to call the NN. The conf file has the following as
parameters:

[classifier.Predicter_NN]
use=classifier.predict_NN:Predicter_NN.factory
mat_file=$HOME/.garageeye/ThetasV7.mat
nmat_file=$HOME/.garageeye/NThetasV7.mat

group is classifier.Predicter_NN

to use it, set
classifier=Predicter_NN
in [app]