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
remove explicit defaults
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
Half list half list ought to be list-media at tablet and above
Merge pull request #6172 from guardian/media-list-cards

Half list half list ought to be list-media at tablet and above