give sections some breathing room so they don't run together and anchors don't jump above headings
a number of updates to styles, data and docs
Merge branch 'origin/master'

Conflicts:
	_config.yml
	data/less.json
	data/translations.yml
	package.json
	templates/helpers/sidenav.js
	templates/includes/head.hbs
Merge branch 'origin/master'