Added dzslides template.
Fixed nesting of conditional around title in slidy template.
dzslides template:  Use default css only if no css links specified.
dzslides: better default template.

* No red color on incremental lists.
* Show authors and date on title page.
* Special styling for title slides (H1 by itself on slide).
* Better default font and font size.
* Better spacing between elements.
* Styling for blockquote and pre.
dzslides: removed extra title element.
Updated dzslides template to current github version.
Improved css for dzslides to prevent text spilling over R side.
Dzslides template - allow images to be their own size.
Added Content-Style-Type meta tag for XHTML compliance.

Closes pandoc#337.
Added Content-Style-Type to s5, slidy templates.
Added asciidoc template.
Improved author/date in asciidoc template.
LaTeX template:  if 'lang' is set, load babel.

Thanks to Magnus Therning for the suggestion.
HTML-based templates: use separate variables for meta-date, meta-author.
Slidy, HTML: Use h2 for author, h3 for date.

Previously, title was h1, author h3, date h4.  There was
no real reason for skipping h2.
LaTeX:  Use \date{} if no date in metadata.

Thanks to Daron Wilson for the suggestion.
Revert "LaTeX:  Use \date{} if no date in metadata."

This reverts commit 9ebdb944b6dd4acbca16129ec244f1795ac88316.
default.rst: Added empty comment after directives.

This prevents a subsequent indented paragraph from being captured
by the directive.  Closes pandoc#321.
Added templates for epub coverimage, titlepage, regular page.

This allows even more user customization.
s5 : Add titleslide class to title slide.