Added chapter explainer to timeline
Display headline if no standfirst exists in timeline
Add standfirst to media items in timeline
Merge branch 'master' into timeline-media
Merge pull request #507 from guardian/timeline-media

Timeline changes
Fixed failed integration test
Added static files recipe to event server deploy.json
Merge pull request #509 from guardian/story

Fixed event server deploy steps
Merge branch 'master' of github.com:guardian/frontend into play-release