Function BuildXMLTree

Rebuild an XML tree in our own style from the parsed XML tags using a tail-recursive approach.

Package: awl\XMLElement
Copyright: Catalyst .Net Ltd, Morphoss Ltd http://www.morphoss.com/
License: GNU LGPL version 3 or later
Author: Andrew McMillan andrew@mcmillan.net.nz
Located at XMLElement.php

Parameters summary
`array`	`$xmltags`	An array of XML tags we get from using the PHP XML parser
`intref`	`& $start_from`	$start_from A pointer to our current integer offset into $xmltags

Return value summary
`mixed`	Either a single XMLElement, or an array of XMLElement objects.