Possible Future Enhancements:

1.  Adjust input, output, desired, wts., node_attr when changing inodes,
    onodes, load state

2.  Have routine read rest of line to print out for batch mode errors

3.  Multilayer support

4.  Various types of learning algorithms besides Rosenblatt's

5.  More output node functions

6.  Graphical front-end

7.  History list (remember what commands user ran), be able to save/load the
    history list

8.  Ability to read/write image/graphic formats (for pattern & image perceptron
    work)

