Travel offers are cached to S3.

Just in case the feed breaks again.
Removed hacky logging
Add sponsor method to MetaData
add sponsor to Section model
Adding metrics to the Travel Offers cacher.
inject pre-badge
refactor tweak
upgrade bootstrap
update references
updating landing page
use bootstrap 3 for homepage
New error text
updating to bootstrap 3
Do not request "Related Content" if we do not want it.

Currently this results in a server side 404, which accounts for a large chunk of our 404s.
re-ordering
Merge pull request #4994 from guardian/sponsors-name

Add 'pre' badge with sponsor's name
Fixed typos.
Merge pull request #5003 from guardian/related-off

Do not request "Related Content" if we do not want it.
Merge branch 'master' of github.com:guardian/frontend into id-witnessActivity
Merge pull request #5004 from guardian/upgrade-admin-bootstrap

Upgrade admin to Bootstrap 3