Copyright 2013 -- Ben Root
Distributable under the CC-Attribution-3.0 Unported license. In other words,
feel free to modify and redistribute, just make sure you attribute the
original source.

That said, I must acknowledge the sources of inspiration for this tutorial.
Much of the content comes from the matplotlib documentation, which is the
collaborative result of many hard-working people around the world. I also
took inspiration from Eric Jones' SciPy 2012 tutorial, as well as Nicolas
Rougier's beginner's guide.