Loss normalized ...

Early stopping with patience improved and fine tuned
Improved checkpoints
Bugfixes
Plot of loss added
Trained save of rnn_lstm_5l_[50,40,30,20,10] added

Early stopping with patience added ...

Checkpoints during training added to go back to best state if perfomance decreases

Removed n_layer as with the new ncells its implicitly stated and added Errors if ncells is of the wrong type (has to be int or a list of ints)