* Getting all active exercises from a course from a session (if a session_id is provided we will show all the exercises in the course + all exercises in the session)
* Getting all exercises (active only or all) from a course from a session (if a session_id is provided we will show all the exercises in the course + all exercises in the session)
* @param array course data
* @param int session id
* @param int course c_id
* @param int course c_id
* @param boolean only_active_exercices
* @return array array with exercise data
* modified by Hubert Borderiou
*/
function get_all_exercises_for_course_id($course_info = null, $session_id = 0, $course_id=0) {