* User management: Rights for a user and group. Used in user and group selections.
* Field management: Web interface
* Collection fields: final remove from entry table
-* Use try/catch for mysql stuff
* Better error handling and display while adding / update and delete
-* better debug. When debug true, write into log file. -> see if(DEBUG)
* Mass edit of entries
* delete of a collection
* sort by filter for collection display