Qual: update NuSoap class for best compatibility with php5.3

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htdocs/includes/nusoap/lib/changelog

htdocs/includes/nusoap/lib/class.nusoap_base.php

htdocs/includes/nusoap/lib/class.soap_parser.php

htdocs/includes/nusoap/lib/class.soap_server.php

htdocs/includes/nusoap/lib/class.soap_transport_http.php

htdocs/includes/nusoap/lib/class.soapclient.php

htdocs/includes/nusoap/lib/class.wsdl.php

htdocs/includes/nusoap/lib/class.xmlschema.php

htdocs/includes/nusoap/lib/nusoap.php

htdocs/includes/nusoap/lib/nusoapmime.php