Lisa bugfixes1

Designed to fix the following startup errors:

    PHP Notice:  Undefined index: data in /var/www/php/maps_feed.php on line 27, referer: http://localhost/

    PHP Warning:  Invalid argument supplied for foreach() in /var/www/php/maps_feed.php on line 37, referer: http://localhost/

    PHP Notice:  Undefined index: filter in /var/www/php/rebound.php on line 55, referer: http://localhost/

    PHP Notice:  Undefined index: mapIDs in /var/www/php/rebound.php on line 60, referer: http://localhost/

    PHP Warning:  Invalid argument supplied for foreach() in /var/www/php/rebound.php on line 90, referer: http://localhost/

    PHP Notice:  Undefined index: data in /var/www/php/landmark_feed.php on line 29, referer: http://localhost/

    PHP Warning:  Invalid argument supplied for foreach() in /var/www/php/landmark_feed.php on line 37, referer: http://localhost/

Also includes retabbing with 4 spaces for formatting standardization.