Add Ophan additional view data in one go.
Only load into empty ads slots
iPhone5 only; userpref overrides everything.
Ignore spurious popstate events
Changed video advert url to PROD domain
Merge pull request #894 from guardian/multi-ads

Prevent ads stacking up
Merge pull request #895 from guardian/iphone5

Swipe on iPhone5 only
Merge pull request #896 from guardian/history

Ignore spurious popstate events
Merge pull request #897 from guardian/video-ad-url

Changed video advert url to PROD domain
Merge pull request #880 from guardian/add-view-data

Add Ophan additional view data in one go.
Merge pull request #898 from guardian/configured-trail-issue

Configured trail issue
Revert "Merge pull request #898 from guardian/configured-trail-issue"
Merge pull request #899 from guardian/configured-trail-issue-revert

Revert "Merge pull request #898 from guardian/configured-trail-issue"