Loads the values of the configuration variables from an XML path.

def load_xml(self, filepath):
        """Loads the values of the configuration variables from an XML path."""
        from os import path
        import xml.etree.ElementTree as ET
        #Make sure the file exists and then import it as XML and read the values out.
        uxpath = path.expanduser(filepath)
        if path.isfile(uxpath):
            tree = ET.parse(uxpath)
            vms("Parsing global settings from {}.".format(uxpath))
            root = tree.getroot()

            for child in root:
                if child.tag == "var":
                    self._vardict[child.attrib["name"]] = child.attrib["value"]