GED - first try

Hi Maât - and a happy new year to you to,

I tried to install the GED-application.
Two minor issues:

1) class.ged_dm.inc.php seems to make calls to $db->unlock() without first 
starting any transaction - resulting in Exception (at least for postgres).

$db->lock() and $db->unlock() are equivalents to $db->transaction_begin() and 
$db->transaction_commit().

2) When adding a file - the database complains about a Not null violation in 
column 'url'  for the table 'ged_versions'


Regards

Sigurd