STYLE: Update CMake style in SoftwareGuide/Latex/CMakeLists.txt

Improve readability.

Change-Id: Ib1fa5921bb0643a160941c03cd563471aa64724c
ENH: Split into two books.

Also fix up dependency specification for LaTeX build.

* Two books to decrease page count
   * I Introduction and Development Guidelines
      * Welcome
      * Installation
      * System Overview
      * Data Representation
      * Iterators
      * Image Adaptors
      * How to Write a Filter
      * Software Process
      * License Appendix
      * ~ 300 pages
   * II Design and Functionality
      * Reading and Writing Images
      * Filtering
      * Registration
      * Segmentation
      * Statistics
      * ~500 pages

Change-Id: Ib33f6e5046486939131c6818bb3b6e3de0ea6321
BUG: Build resolving citations.

According to

  http://www.tex.ac.uk/cgi-bin/texfaq2html?label=usebibtex

To resolve citations, we must run

  LaTeX; BibTeX; LaTeX; LaTeX

Change-Id: Ibc98220275073846a718b2d8befc817668b2d528