Rename facia container modifier from 'article' to 'content'
Add site border wrappers to templates
Style borders on the side of the page
Cap width of the bison image
Fix a bug where a whitespace would appear between the bottom of the body and the footer
Add borders to the /all template
Rename component into l-side-margins
Show side margins until page skin kick in
Merge branch 'master' of github.com:guardian/frontend into site-margins

Conflicts:
	common/app/views/fragments/contentFooter.scala.html
Merge branch 'site-margins' of github.com:guardian/frontend into site-margins
Merge pull request #5169 from guardian/site-margins

Side margins (grey borders on each side of the content)