Merge pull request #17 from mor1/master

updates and bugfixes
[reveal] add minimal 2.6.2
whitespace
[reveal] break out style to prep for using 2.6.2
[reveal] more support for reveal.js-2.6.2 as well as 2.4.0
[reveal] finish adding support for reveal.js-2.6.2
[theme] start to rebuild horizon theme for reveal.js-2.6.2
[theme] update `init.js` for reveal.js-2.6.2
[theme] add renderer for reveal.js-2.6.2
[oscon14] add oscon14 to slides list
[oscon14] use reveal.js-2.6.2
[theme] revert `horizon.css` to `sky.css`
[oscon14] first cut at some content
[oscon14] tweak theme some more, make vertical slide set separator more visible
[make] add `make depend` target; stop reconfiguring every build
[css] apply openmirage `site.css`
[css] more theme tweaks plus whitespace: rolling links, page background
[theme] rolling links
[theme] more line height and roll tweaks
[assets] crop 50px of transparent background from `cloud-bg.png`