added download dir for $script.js library

Completely refactored the way JavaScript arrays are flattened

Switching drupal.js with our version

Added extra check in hook_requirements to warn against using Drupal core JavaScript aggregation

Tweaked $script.js path to assume full library downloaded and extract, so use "dist" subdir

Modified drupal.js to use $script.ready() instead of jQuery.ready()

Implemented support for downloading library via Drush