Represent Neural Networks.

This module contains classes to represent Generic Neural Networks that can be trained.

Many of the ideas in this and other modules were taken from Neil Schemenauer’s bpnn.py, available from:

http://www.enme.ucalgary.ca/~nascheme/python/bpnn.py

My sincerest thanks to him for making this available for me to work from, and my apologies for anything I mangled.