LaTeX template:  Changes to make mathfont work with xelatex.

We need the mathspec library, not just fontspec, for this.
We also need to set options for setmathfont.
revealjs template: use remotes by default, set defaults from query hash.
Fixed errors introduced in last revealjs template update.
default.latex: Redefine includegraphics to allow custom options.

Thanks to Bernhard Weichel.
Now, literal \includegraphics commands with square-bracketed options
will work properly.  When no options are given, a default option
limits images to the text width.
default.latex:  Use \ScaleIfNeeded w/ nicer def instead of \maxwidth.
default.beamer:  Added comment to graphics section.
Add class attribute to title slide section tag

It would be useful to have a class attribute for the title slide's section tag. For example, this is useful for setting a background image unique to the title slide.
Merge pull request #29 from abakst/patch-1

Add class attribute to title slide section tag
Add citecolor variable
Added subtitle to html and latex formats.
OPML template:  Use 'for' in author.
Added #TITLE: to title in org template.

Previously the writer inserted this.
Merge pull request #31 from aaronwolen/master

Provide a variable to define citation color
man template:  removed `description`, added `header`, `footer`.

Added quotes where needed.
default.latex: Use tex-ansi mapping for monofont.

This ensures that straight quotes appear as straight, rather than
being treated as curly.  See pandoc#889.
Initial work to create dokuwiki write (#386)

In this first version, all dokuwiki files are straight copies of the
media wiki counterparts.
LaTeX/Beamer templates:  Add classoption variable.

This is intended for class options like `oneside`; it may
be repeated with different options.
LaTeX template:  Added `biblio-style` variable.
default.beamer: Add font theme option

Add font theme option to choose one of the sets of structural fonts
that come predefined with Beamer.
Merge pull request #36 from logc/master

default.beamer: Add font theme option