Initial attempt
Track ad impressions event in Omniture
Code cleanup
Only fire if the element is not hidden
Adding switch
Code cleanup
shortened event name
Updated test spec for ad impression event
Correcting Omniture report suite for dev envs
Merge branch 'master' into inview-event

Conflicts:
	common/app/conf/switches.scala
Change paragraph intervals
JSHint
Using fancy new common.toArray() method
Cleaner code
Merge pull request #1298 from guardian/inview-event

Ad impression tracking