Add FaciaContentApiProxy endpoints behind ExpiringAuthentication
Add FaciaOphanApiController endpoints behind ExpiringAuthentication
Add two methods into ExpiringAuthAction, one returning Future[SimpleResult] and
another returning SimpleResult. Same behaviour as AuthAction
Fake tags at the end of the article for styling
Style tag lists
Simplify links states CSS and make them more accessible

- Remove superfluous :link and :visited states
- Add :focus states
Rename taglist into keywords and display it in video, galleries and liveblogs
Add missing metadata
Use new colour conventions
Fix number of tags in test
Merge branch 'master' of github.com:guardian/frontend into article-tags
Merge branch 'master' of github.com:guardian/frontend into article-tags
Bump up contrast of keyword links
Bump up text size and remove extra rules
Commas are attached to the keywords
Mention the ophan host & key
Abstract inline lists into new inline-list helper
Ready to use colours helpers
Ready to use font helpers
Merge branch 'master' of github.com:guardian/frontend into article-tags