fix issues

add more info on exploding grad. Remove some training outputs

Update README

add other optimizers + test

add optimizers - untested

clean up NN module

update README

add tanh + dropout and applying dropout to partly fix exploding gradients problem

fix minor bug in gradient calculation + Add note for big weight error

rerun nb

add exit clause to RF + fix few RF bugs

finish NN

add activation classes module, adding more stuff to NN module

note

finish KNN module. Add neural net module