Store.php: _GET['s'] and _POST['s'] will be saved during initialization to check later, if the call is for 'form load' for 'form save'.

Store.php: _GET['s'] and _POST['s'] will saved during initialization to check later if the call is for form load for form save.

 *.sql: extend definition to test Set and Enum.

index.php: tried to make phpunit tests all running - no success, but changes are still meaningfull.

Store*.php: Storage Classes unified to one class. Storage is now one array for all stores in class 'Store'