Bump grunt-asset-monitor version number
Merge pull request #2657 from guardian/monitor-assets

Bump grunt-asset-monitor version number
Add ab test participation links
Additional participation styling
Remove heading gap
Merge pull request #2659 from guardian/ab-admin-optin

Add ab test participation links
Revert grunt asset monitor version
Revert grunt asset monitor version
Merge branch 'master' of github.com:guardian/frontend into open-authors