Add error pages to Identity

Identity doesn't currently have a webserver in its stack so we're
leakign Play messages to clients. We'll review the stack but in the
meantime this provides standard Guardian error pages on production,
tweaked so they work over https.
New ordered list style
New bulleted list styles
Merge branch 'master', remote-tracking branch 'origin'
Suppress bold/italic from headline
Adding quotemarks
Remove unused images
Adding quotemarks
Merge branch 'master' of github.com:guardian/frontend
Merge remote-tracking branch 'origin/bacon' into article-type

Conflicts:
	common/app/assets/images/global/sprite.png
	common/app/assets/stylesheets/theme/_global-icons-sprite.scss
CSS floats for positioning
Merge branch 'master' of github.com:guardian/frontend into bacon-story-package
Merge branch 'master' of github.com:guardian/frontend into bacon-story-package
Merge branch 'bacon' of github.com:guardian/frontend into bacon-story-package
Merge branch 'master' of github.com:guardian/frontend into bacon-story-package
Add responsive viewer
Button tweaks
View, not Preview
Rename breakpoints
Refactor. Only pass a single config in queryStr.