Add test GA accounts and allow for localhost google analytics testing.
Added events tracking as per trello card #84
event argument not needed since GA events are handled elsewhere
Extracted google analytics account id define to wp-config. Use LSB_GOOGLE_ANALYTICS_ID and BOKSOK_GOOGLE_ANALYTICS_ID in wp-config.php
Fire scroll log event only once per section per page view
Log pagination clicks on book archive pages
Search results event tracking.
GA events, better labeling.
Merge conflict resolved
Merge branch 'feature/google-analytics' into develop