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
Refactor Makefile slightly

Add the subdirectory for each document automatically.
Bump version to 0.1.1

* Moves preamble material to a shared repository and streamlines the
  code
* Fixes some issues in the appearance of the main texts
* Changes to a more informative title and author.