Added multiplexing server
Tweaked heading
Don't suppress the whole event, just add context metadata
Removed unused code
Not for github
Not got github
Multiplex fixes
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