Refactor ccap preface

<h2>Summary </h2>
+ restructured .LESS files in congruence with .LESS specification and coding standards (comments, imports, mixin, variables, code blocks)
+ grouped and restructured book toc rules in base
+ rewrote book specific styles

<h3>Development Testing</h3>
+ Anatomy: http://naginata.cnx.rice.edu:9090/content/col10010/latest/pdf
+ Biology: http://naginata.cnx.rice.edu:9090/content/col10001/latest/pdf
+ Biology NonMajors: http://naginata.cnx.rice.edu:9090/content/col10006/latest/pdf
+ Physics: http://naginata.cnx.rice.edu:9090/content/col10003/latest/pdf
+ Sociology: http://naginata.cnx.rice.edu:9090/content/col10004/latest/pdf

<h5>Additional Testing Results for Review (regression)</h5>
+ Control PDF's: http://mountainbunker.org/~jburnett/refactor_controls
+ Result PDF's: http://mountainbunker.org/~jburnett/refactor_results