Allow file extension Master Study Scorm Addon

<?php
function stm_lms_scorm_allowed_files_ext($allowed_ext) {
	array_push($allowed_ext, 'cur');
	array_push($allowed_ext, 'DS_Store');
	return $allowed_ext;
}
add_filter('stm_lms_scorm_allowed_files_ext', 'stm_lms_scorm_allowed_files_ext');