Refactor story bootstrap
Adverts in context
Merge branch 'master' into dom-context-12
Limit page:ready emits to once per context
Advert module loads once only
Classes instead of IDs.
Prevent multiple trailblock-showmore inits
Empty ad slot before loading
Ads emptied before load. Football table loads once only.
Simpler way of preventing multiple bootstrap inits
Initialise once only: nav, football tables, trail togglers, showmore, etc.
Fix merge conflict
Fix merge conflict
Re-enable analytics
Update jasmine and integration tests
Fix merge conflict
Make football tests use correct pa host
Merge pull request #718 from guardian/dom-context-12

Refactor advert, football, and story modules