Basic working loop
Fix spacing in code sample slide
add js for page-turning
Rip out rstblog and replace with static Jinja2 build script.
Merge branch 'master' into jinja2-only

* master:
  add js for page-turning
Move JS to top-level static/ dir.
Change Sass config to use top-level static/ dir.
Re-add fonts.
Make all necessary output subdirs.
Move all building stuff into source/; outputs to root dir.
Fix static assets
Add source sans/code fonts