Lisa bugfixes1

**PHP code standardization**
Complete, to the best of my ability

**Errors fixed:**

    PHP Notice:  Undefined index: data in /var/www/php/rebound.php on line 52, referer: http://localhost/

    PHP Notice:  Undefined index: data in /var/www/php/rebound.php on line 52, referer: http://localhost/

    PHP Notice:  Undefined index: timespec in /var/www/php/record_landmark.php on line 64, referer: http://localhost/

    PHP Notice:  Undefined index: startdatetimepicker in /var/www/php/record_landmark.php on line 65, referer: http://localhost/

    PHP Notice:  Undefined index: enddatetimepicker in /var/www/php/record_landmark.php on line 66, referer: http://localhost/