Eob references

<h3>Summary</h3>
+ new feature: eob-references
+ add to anatomy and style
+ hide class from (biology, physics, sociology)
+ removed copyright from book-specific .less files. left copyright only in base as not to convolute the dynamically generated .css files

<h4>Testing</h4>
+ http://naginata.cnx.rice.edu:9090/content/col10010/latest/pdf
+ http://naginata.cnx.rice.edu:9090/content/col10010/latest/epub

<h4>Regression Testing</h4>
<h5>Biology Majors/NonMajors</h5>
+ http://naginata.cnx.rice.edu:9090/content/col10001/latest/pdf
+ http://naginata.cnx.rice.edu:9090/content/col10001/latest/epub
+ http://naginata.cnx.rice.edu:9090/content/col10006/latest/pdf
+ http://naginata.cnx.rice.edu:9090/content/col10006/latest/epub
<h5>Physics</h5>
+ http://naginata.cnx.rice.edu:9090/content/col10003/latest/pdf
+ http://naginata.cnx.rice.edu:9090/content/col10003/latest/epub
<h5>Sociology</h5>
+ http://naginata.cnx.rice.edu:9090/content/col10004/latest/pdf
+ http://naginata.cnx.rice.edu:9090/content/col10004/latest/epub