Update shared LaTeX files
Update appearance

* Fix table of contents so that chapter headings appear (they've been made into 'parts')
* Update author to be more informative
* Set up local LaTeX preamble
* Eliminate extra blank pages by switching to tufte-handout
Refactor Makefile slightly

Add the subdirectory for each document automatically.
Bump version to 0.1.0

This release gets the text decently organized and presented.  This
groups the sections of the textbook into four largish handouts that
use the tufte-latex handout style, and moves a lot of the preamble
material to files that are shared across several other projects.