these are examples, not semantically headers in our document—changed to <p> elements.
*properly* fix the typographic scale demo margin issues
fix merge conflict in _site. IT was bogus
switch to light prism styling, add example background and container styling, starting to futz with index.html to get it all properly formatted
add font-family var to drop-cap mixin
MASSIVE UPDATE to index.html. PLEASE NOTE CHANGES AND MERGE MINDFULLY