revert last commit, didn't work

git-svn-id: http://svn.montala.net/svn/resourcespace@4397 c08608d7-6e46-0410-86ca-f2a6f1370df5
added fixed !empty search based on resource_data rather than resource_keyword, needs some more testing


git-svn-id: http://svn.montala.net/svn/resourcespace@4398 c08608d7-6e46-0410-86ca-f2a6f1370df5
attempt fix for 'empty' special search

git-svn-id: http://svn.montala.net/svn/resourcespace@4399 c08608d7-6e46-0410-86ca-f2a6f1370df5
fixed ability to call empty field search by number or shortname

git-svn-id: http://svn.montala.net/svn/resourcespace@4400 c08608d7-6e46-0410-86ca-f2a6f1370df5