Remove currently unused classes
Remove tests which test Play CRSF system

It's a little redundant to test Play Framework features unless there's
special justification for doing so.
Class identifies snappable items. Increase height to 250px.
Refactor authentication ActionBuilders [#MEM-403]

The basic cookie-based authentication is now wrapped by Play's
AuthenticatedBuilder rather than our own code, and the
authentication-backed-by-Identity-API lookup is now composed with this and
an ActionRefiner that does the API-lookup.

AuthActionTest removed because it's effectively testing
AuthenticatedBuilder now, which is tested within Play:

https://github.com/playframework/playframework/blob/9b33c199a/framework/src/play-integration-test/src/test/scala/play/it/auth/SecuritySpec.scala#L15

Play's AuthenticatedBuilder is also used elsewhere in the Frontend project
for the Admin app:

https://github.com/guardian/frontend/blob/3ee4896/admin/app/controllers/IndexController.scala#L17

https://jira.gutools.co.uk/browse/MEM-403
New layout for tag pages.
Merge branch 'master' into other-tag-pages-restyle
Image replace option fix
Merge branch 'master' into snaps-revisit
Fix football table
Merge master
Merge branch 'master' into other-tag-pages-restyle
Fix from merging.
Merge branch 'master' into snaps-revisit
Use js- class instead
Fixed integration tests.
It works localy but not on the server.
Fix all the show/hide toggle bugs
Merge pull request #6372 from guardian/other-tag-pages-restyle

Other tag pages restyle
Merge pull request #6379 from guardian/fix-show-hide

Fix all the show/hide toggle bugs
Merge pull request #6340 from guardian/snaps-revisit

Snaps revisit