Fix broken function and update for CiviCRM 5.4+/PHP7.4+
Extension was not working with PHP 7.4/CiviCRM 5.4.1 (tested on multiple installs). Update code and edit key function to handle apparent changes in $options array. Incremented version number, fixed comment links to documentation and corrected reference to the CiviCRM hook used by this extension to pull in languages array.