Major code clean-up, ala Conal.

No functional change, wrt/ v1.0.0.
However, the code in this release is much cleaner, thanks to Conal's suggestions.
See issues:

• #9
• #10
• #11
• #12

iris-concat matches iris, at >90% accuracy.

In this release, the results for iris classification match, between the iris and iris-concat examples, both yielding >90% testing accuracy.