Num data used back to total
Added loads to all data sets
Added activations and softmax equations
Fix loads in another data sets

There are differences with the clas numbers, indexing, etc.
That have to be set differently for each set
Fix error in predictions_class variable for dataset 2
Added option for loading the 3rd data set
Added bayes equation
No longer using sparse matrices
Fix error updating the gradient
Added L log equation