set font family for lists to Open Sans
hide pagination toc by default
replace min.css with .css for cosmo theme
move html tag to newline
add config for widgets
cosmetic change in head.html
add code loading video in popcornjs
set default font to open sans
move toc click action into slide-deck.js
add config file for mathjax
Revert "add config file for mathjax"

This reverts commit ebe684413a3979f964d1fdaf19f4e027e0d3827e.
add syncVideo function to popcorn-custom.js
use slide.num instead of custom metadata in opencpu interactive slides.