Added support for the tag <booking_date> which is part of <delivery_note_registration>, <delivery_note_goods_registration>
and <delivery_note_order_registration>.
Added support for the tag <delivery_note_paid> which is part of the main command structure.
Added support for the tag <used_fixed_quantity> which is part of <delivery_note_registration>, <delivery_note_goods_registration>
and <delivery_note_order_registration>.
Added support for the tag <customer_article_number_2> which is part of <delivery_note_registration>, <delivery_note_goods_registration>
and <delivery_note_order_registration>.
Added support for the nodes <delivery_note_goods_registration>, <delivery_note_order_registration>, <delivery_note_goods_vat>,
<delivery_note_order_vat>, <delivery_note_goods_subtotal>, <delivery_note_order_subtotal>, <delivery_note_goods_total>, <delivery_note_order_total>,
<delivery_note_prepayment_total>, <delivery_note_order_prepayment> and <delivery_note_goods_order_customer_summary> as children
of the node <delivery_note>.