adding book license select options
Merge branch 'dev' into cc-license
initial commit for copyright license module, web interface
adding copyright notice to pdf, xhtml output
modifying pdf,xhtml output adding epub output and language support
clean up styling, formatting, epub3 output
adding to icml, hpub, epub3 exports
consistent semantics for variable
shedding extra remote call, fixing php warning
changing naming convention to be more focused
changing logic to append, not take away
Merge pull request #62 from bdolor/cc-license

CC licensing, props to @bdolor.