populate front properties
move JSON serialisation implicits to companion objects
Merge remote-tracking branch 'origin/master' into facia-metas

Conflicts:
	common/app/model/facia.scala
og:image from facia properties
remove redundant implicit
code format
Added data components attribute for nav.
Merge remote-tracking branch 'origin/master' into facia-metas
Add Free HTML kicker
Add tag & section kicker options in tool
Add tag & section kicker options in model
Add dead blog tone
add the dfp agent lifecycle to onward
fix indentation
remove explicit defaults
Merge pull request #6168 from guardian/fix-timeline-comment-link

fix indentation
add 250 ad to audio pages with text
Add logic for showing item-level section and tag kickers
Add ad to audio pages, if it has a body
more generic --dark ad slot styles