First stab at adding OpenGraph data
Removed unnecessary file
Change to List and add Keywords
Merge branch 'master' into metadata-deluxe
Added tags to video meta data
Cleaned up opengraph data
Removed duplicate opengraph entries
Added a space for @kaelig
Added fallback for opengraph image image
Merge pull request #1387 from guardian/metadata-deluxe

Opengraph meta data