Alter how we signifiy media types; use a class on h3 element, which we can style with ::before
Remove stray <div>
Merge pull request #219 from guardian/related-cards

Alter how we signifiy media types; add class to h3 element
Merge master into styleguide
Merge branch 'styleguide' of https://github.com/guardian/mobile-apps-article-templates into styleguide