[feladat @ 158] Bugfix for ticket:18: Minor modification in the CSS to make sure no data is displayed on top of other data. Also a little modification to make sure the sub-owners (if there are any) are displayed above the record form, instead of next to it.

[feladat @ 156] Made a lot of small changes to allow PHP to run with error_reporting E_ALL without giving notices. Most functions have been checked but some situations might give a notice.

[feladat @ 127] Bugfix for ticket:5 : Modified the query which searches zones to also find empty zones by adding a LEFT JOIN.