pendigits analog of `test.c`

[rjp]

Extra test example using http://archive.ics.uci.edu/ml/machine-learning-databases/pendigits/ showing scaling of input values and conversion of single output value into a {0,1} vector (because otherwise it doesn't work all that well.)

[glouw]

It may be simpler to separate the other training data into 90% train and 10% test. One can do so with head and tail in unix.

[rjp]

I don’t think I quite follow - this is a different example with the pendigits data, not a tweaking of the semeion data.