Changes to make PDF output match the browser view more closely
  font-size: 18pt; instead of fount-size: 22pt;
  remove the "a" tag from def that forces font size, otherwise anchors in various contexts, e.g., headings, etc., will cause ugly rendering due to mismatched font size.
   specify font size for "pre" tags so that code listings more closely match browser rendering
disable html entity escapes in showdown (cloes #153 & #152)
rollback change in showndown, stop highlight.js's html entity escape #523
slightly larger preview of next slide in speaker notes (closes #147)
max-height and overflow for code blocks (closes #16)
minified version of showdown
main.css > reveal.css
facility for css shader transitions, add css shader based tile-transition
new slide
simple serif font theme
add link to serif theme in default presentation
add 'none'-transition (closes #159, #160)
add override flag to overview toggle, code cleanup
Merge branch 'serif-theme' of https://github.com/maxogden/reveal.js
prevent touchmove default action on android (#143)
remove duplicate padding/margin reset on html & body
root reset styles at .reveal (#163)
new paused mode feature (closes #144), controls and progress DOM elements are no longer required in HTML
wrap markdown in script text/template to fix parsing errors (closes #146 #155 #162)
update re markdown