New method:
   JAXBElement<?> getListItemByQName(List<JAXBElement<?>> list, QName name)
LineSpacing: handle the CSS default 'normal' sensibly when importing
In XHTML import, span/@style='background-color:red;' would usually become w:rPr/w:shd/@w:fill="ff0000"
Now you can configure it to use w:highlight instead