Ignore lib, include, etc
Defer loading JS until the end of the document.
Support custom Javascript in slide themes.
Fire a Javascripte event on slide resizing.
Added support for specifying slide_classes in slide_conf
Copying build, figure docs into styling so all visual stuff is in one place.
Added fade-in, appear transition classes.
Added hieroglyph-quickstart program for bootstrapping presentations.
Sphinx test and test loading infrastructure.
Adding initial unit tests for slideconf directive.
Fixed bug when content is included when autoslides are disabled
Fixed issue #30: slides directive may omit title or content.
Fixed issue #26: slide numbering is just plain wrong.

Previously we were incrementing the slide count:

a) as soon as we visited a slide, and
b) regardless of whether or not this slide was going to be rendered as
   a slide or a div.

After incrementing, however, we'd often call depart_slide to close the
previous slide. To compensate for (a), _add_slide_number was called
with (count - 1) when departing a slide.

This commit simplifies the logic: we increment right before we call
starttag, and only when we're creating a slide. This means we also
don't need to worry about subtracting 1 to get the actual slide
number.