Function strNewTree

Creates a new category tree (root category item).

Package: Core\Backend
Copyright: four for business AG <www.4fb.de>
License: http://www.contenido.org/license/LIZENZ.txt
Author: Olaf Niemann
Author: Murat Purc <murat@purc.de>
Located at includes/functions.str.php

Parameters summary
`string`	`$catname`	The category name
`string`	`$catalias = ''`	Alias of category
`integer`	`$visible = 0`	Flag about visible status
`integer`	`$public = 1`	Flag about public status
`integer`	`$iIdtplcfg = 0`	Id of template configuration

Return value summary
`(int`	null) of new generated category or nothing on failure