Changed option passing to use the constantized name of each renderer
Renamed XmlRenderer to XMLRenderer for consistent capitalization
Some specs and code for new AutoQCMRenderer
Renamed html_template dir to templates/ since will contain examples of
different kinds of templates now
Added a module that can sanitize text for Latex/AutoQCM output, and
tests for it
Improved formatting and fixed return-value bug in AutoQCM renderer
Changed html5 template and renderer to ONLY use 'quiz' object in
template; modified command-line help accordingly