Added metrics for Video confidence
Merge branch 'master' of github.com:guardian/frontend into video-confidence

Conflicts:
	common/app/assets/javascripts/bootstraps/media.js
Tag fronts are now considered Section/Subsections

As per AdOp requirements.
Add beacon which tells us how many videos started after the preroll started
Dodgy little println
Cleaned up some unneeded copy 'n paste
No need for that space
fix 'remove front from storage' bug, and delete old fonts
Fixing the build
Remove import
Change the callback to 9000 instead of 9001
Merge branch 'change-admin-callback-port'
Merge pull request #5272 from guardian/video-confidence

Video confidence
Merge pull request #5282 from guardian/adunitsToHaveSubsections

Tag fronts are now considered Section/Subsections
better removal of old fonts
comment
dont need config
Merge pull request #5283 from guardian/font-removal-bug

Fix bug stopping old fonts being deleted from local storage
Merge branch 'master' into fix-switchboard