Add sponsor method to MetaData
add sponsor to Section model
Modify the gu_shift cookie to indicate if someone has opted out (or in)

Making it easier for product managers to do stats.
Merge pull request #4989 from guardian/shift-opt-outs

Modify the gu_shift cookie to indicate if someone has opted out (or in)
Add tracking to structured comments
Merge branch 'master' of github.com:guardian/frontend
Fix comment setiment posting
Fix comment setiment posting
omit overlapping checks
Structured comments hot fix
Merge pull request #4993 from guardian/structured-comments-hotfix

Structured comments hot fix
inject pre-badge
refactor tweak
Merge pull request #4992 from guardian/facia-tool-fewer-alerts

facia tool: omit overlapping checks
Revert my stupid changes.

There was never any possibility this would work.
upgrade bootstrap
update references
updating landing page
use bootstrap 3 for homepage
Append GU_VIEW cookie to AB tests if the user in the test cohort.