Classes to help deal with stopping training a neural network.

One of the key issues with training a neural network is knowning when to stop the training of the network. This is tricky since you want to keep training until the neural network has ‘learned’ the data, but want to stop before starting to learn the noise in the data.

This module contains classes and functions which are different ways to know when to stop training. Remember that the neural network classifier takes a function to call to know when to stop training, so the classes in this module should be instaniated, and then the stop_training function of the classes passed to the network.