Add support for multi-element attribute groups

[veewee]

Q	A
Type	feature/bug
BC Break	no
Fixed issues	#19

Summary

Supports attribute containers with multiple elements:

    <xsd:complexType name="immobile">
        <xsd:sequence>
            <xsd:element name="categoria" type="Q1:categoria" maxOccurs="1" minOccurs="1"/>
            <xsd:element name="citta" type="Q1:citta" maxOccurs="1" minOccurs="1"/>
            <xsd:element name="indirizzo" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="numero" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="zona" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="coords" type="Q1:geo-coordinates" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="descrizione" type="Q1:ArrayOfDescrizione" maxOccurs="1" minOccurs="0"/>

            <xsd:element name="allegati" type="Q1:ArrayOfAllegato" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="composizione" type="imm:immobile-abitabile" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="appartamento" type="imm:immobile-appartamento" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="superficie" type="imm:immobile-superficie" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="terreno" type="imm:immobile-terreno" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="casa" type="imm:immobile-casa" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="villa" type="imm:immobile-villa" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="capannone" type="imm:immobile-capannone" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="ace" type="imm:immobile-ace" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="attributi" type="imm:ArrayOfAttributo" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="cucina" type="imm:tipo-cucina" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="giardino" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="parcheggio" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="riscaldamento" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="box-auto" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="posto-auto" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="impianto-tv" type="xsd:string" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="immobile-turistico" type="imm:immobile-turistico" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="distanze" type="imm:ArrayOfDistanzaPoi" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="codice-identificativo" type="imm:codice-identificativo" maxOccurs="1" minOccurs="0"/>
            <xsd:element name="informazioni-extra" type="imm:ArrayOfInformazioniExtra" maxOccurs="1" minOccurs="0"/>
        </xsd:sequence>
        <xsd:attribute name="id" type="xsd:string"/>
        <xsd:attribute name="id-agenzia" type="xsd:int"/>
    </xsd:complexType>

immobile
========

> http://www.immobinet.it/schema/WebserviceImmobileBundle:immobile {
    categoria $categoria
    citta $citta
    ?string $indirizzo
    ?string $numero
    ?string $zona
    ?geo-coordinates $coords
    ?ArrayOfDescrizione $descrizione
    ?ArrayOfAllegato $allegati
    ?immobile-abitabile $composizione
    ?immobile-appartamento $appartamento
    ?immobile-superficie $superficie
    ?immobile-terreno $terreno
    ?immobile-casa $casa
    ?immobile-villa $villa
    ?immobile-capannone $capannone
    ?immobile-ace $ace
    ?ArrayOfAttributo $attributi
    ?tipo-cucina $cucina
    ?string $giardino
    ?string $parcheggio
    ?string $riscaldamento
    ?string $box-auto
    ?string $posto-auto
    ?string $impianto-tv
    ?immobile-turistico $immobile-turistico
    ?ArrayOfDistanzaPoi $distanze
    ?codice-identificativo $codice-identificativo
    ?ArrayOfInformazioniExtra $informazioni-extra
    @?string $id
    @?int $id-agenzia
  }