footer adjustments and grid (earn page) fix
favorite hidden in css - this needs to be done in templates
Preliminary Challenges page (need copy + first image) and active menu item fix
Challenges title to match other pages
Learn grid height set and overflow ellipsis
learn/earn filter padding fix
footer (lower) padding adjustment
embed video
Additional badge graphic on challenges page
return false on embed modal close
Merge branch 'master' of https://github.com/mozilla/CSOL-site

Conflicts:
	static/media/css/core.css
	static/media/less/core.less
oops, forgot to remove conflict markers
conflict markers
autoplay video
footer list item border fixes
fade background when video displays
fix disappearing LOG IN button and ensure landing LOG IN stays white
fade background then modal for more pleasant ux
Merge pull request #322 from mgballard/master

footer, active menu item, grid (ear/learn) fix + challenges page