TWO_SIDE - If defined, two sided output will be created. This
means that new chapters will only start on odd
numbered (aka right side, aka recto) pages and the
headers and footers will be aligned appropriately
for double sided paper. Blank pages may be added as
needed.
BOOK_OUTPUT - If defined, this will set all of the other
print-output options that can significantly increase
the build time, but make for much nicer looking
output.
To implement the two sided output, we need to override a TeX variable
to control the behavior of the JadeTeX macro package. So this also
introduces a TEXCMDS variable that can be set with additional TeX
commands that should be run before processing the input TeX document.
In the TWO_SIDE case, we simply set it to \def\PageTwoSide{1}