Deleted a bunch of stuff we no longer use.

Mainly the feature trailblock editor and some leftovers from story telling.
Remove uneeded admin files
New ab tests admin page
Update browser stats to use common libraries
Add a local dist script for testing
Remove curl and omniture from admin
Move radiator js into admin js application
Only use auto refresh in radiator
Use lodash main only
Use location rather than doc title to do admin routing
Merge pull request #2642 from guardian/admin-ab-test-page

Admin ab javascript application