AND-3194 - Initial fix working version with new setTimeOut looping functions set at 20 second delays.
AND-3194 - Refactored to only trigger ad position poller function on content that includes an iFrame
AND-3194 - Added additional condition to check if there is an iFrame in the article OR if there is an interactive class present, due the following error message when an iframe is contained within a figure element as is the case where articles contain interactive forms - Blocked a frame with origin null from accessing a frame with origin http://interactive.guim.co.uk.  The frame requesting access has a protocol of file, the frame being accessed has a protocol of http. Protocols must match.
Merge pull request #304 from guardian/AND-3194

AND 3194