/**
 * Get time invested.
 * Custom added to class unfuddle
 * @param $date array containing group_by, start_date and end_date
 * For example:
 * $date = array(
 *  'group_by' => 'person',
 *  'start_date' => '2009/10/12',
 *  'end_date' => '2009/10/18',
 * )
 */
public function getTime($personID, $date) {
  try {
    $time = $this->request($this->url . '/api/v1/account/time_invested.xml', $date);
    return $time;
  }
  catch (Exception $e) {
    $message = $e->getMessage();
    echo '\nError: Unable to retrieve time tracking from Unfuddle';
    echo '\nError message: '.$message;
    return FALSE;
  }
}