...this was actually blowing up on more than one result from find(1).

My brain is starting to fuzz out.  It's creeping up on 1am.  I can
already tell dragging out of bed in the morning is going to be pure hell.

I wonder if it's going to be snowing.  I hope not.  I want to ride my
bike to work.

It will probably be snowing.  Or raining.  Or there will be a plague of
frogs or something.

Also adds a few dependencies to Makefile, comments out some formatting
in render.pl, sets up a demonstration of converting a program from
specific -> general, perhaps lays groundwork for a discussion of the
utility of diff(1) in software terms, which seems like a good transition
back to extant literary tooling.

- hr between chapters
- fix a chapter link
- Adventure bit, sorta

Going to start including index.html for ease of distribution.

HOW WILL THESE RENDER?  WHO KNOWS!?!

Trying to hone in on the idea of indirection, abstraction, generality,
the manipulation of semantics by semantic-agnostic means.

"Indirection" is a hard one to put across.  Or at least it _seems_ like it
is.

Warning:  This executes arbitrary shell commands in whatever it's run
against.  Be real sure you want to do that.

...plus a handful of random text tweaks.