Simplify CSS setup, everything is in global.min.css, loaded through a link in the head
Merge branch 'master' of github.com:guardian/frontend into css-head

Conflicts:
	common/app/assets/stylesheets/global.scss
Merge branch 'master' of github.com:guardian/frontend into css-head
Merge branch 'master' of github.com:guardian/frontend into css-head
Merge pull request #1069 from guardian/css-head

Simplify CSS setup, everything is in global.min.css, loaded through a link in the head