Added reading file
Merge branch 'master' into reading-delegate
Testing new version of ophan to log data
Moved tracking to use new ophan additional data method
Added video engaement tracking and pushing to ophan
Added gallery tracker
Fixed jshint errors
Fixed ophan extension
Added prefix to all data being sent
Mopved to minified ophan and moved path into config
Merge branch 'master' into reading-delegate
Merge pull request #433 from guardian/reading-delegate

Reading delegate