Include player images on the player cards in the football admin

The sport s3 bucket is configured for the application and being used
to provide player images in player cards.
Addition of LARGE football crests
Merge branch 'master' of github.com:guardian/frontend into add-player-images-to-football-admin
Smaller crests for football
Responsive crests
Vertical alignment of crests
Variablise football crest sass
Merge pull request #3614 from guardian/add-player-images-to-football-admin

Football crests on scores...