fixed continue reading tracking and now using 'data-is-ajax' attribute
Added audience science keys to Ophan additional data call
Merge pull request #844 from guardian/audsci

Added audience science keys to Ophan additional data call
using hasAttribute to test for 'data-is-ajax' presence
Merge pull request #838 from guardian/story-tracking-fixes

Fixed link tracking on story pages
TODO is done
Merge branch 'master' of github.com:guardian/frontend into apache-async