[REFACTOR] Swapped order of 'Assessment' and 'Authoring' in nav and
homepage.

https://app.asana.com/0/8825147419757/8896712636304
[FEATURE] add Google Analytics via GTM

https://app.asana.com/0/8825147419757/8912728016122
[REFACTOR] Refactored the structure of files within www and fixed nav active status.
[BUG] Fixed relative paths issue in demo links
Merge branch 'develop' of github.com:Learnosity/learnosity-php-examples into develop
[BUG] Fixed relative path issues
[POLISH] Cleaned up JSON config object
[BUG] Fixed json_encode bug in RequestHelper.php and others
[FEATURE] Added questions api "features" demo page.
[BUG] Fixed path for xhr.php for preview items in author api demo.
[FEATURE] Translated core demo site Items Assess and Inline to jsp
[BUG] Fixed broken author api preview modal

https://app.asana.com/0/8825147419757/9026931323883