Add a new size to the textsans font scale
Remove section-head and simplify localnav title
Coding conventions
Remove unused font scale values
Merge branch 'master' of github.com:guardian/frontend into font-scale-tweaks

Conflicts:
	common/app/assets/stylesheets/_vars.scss
Merge branch 'master' of github.com:guardian/frontend into font-scale-tweaks

Conflicts:
	common/app/assets/stylesheets/module/_article.scss
Merge pull request #3918 from guardian/font-scale-tweaks

Font scale tweaks & update