#10 Add XML output for interoperability

[Johan]

As an example:

<pruce>
<selruhe>coi ro do</selruhe>
<teryruhe>
<cmavo selmaho="COI">coi</cmavo>
<cmavo selmaho="PA">ro</cmavo>
<cmavo selmaho="KOhA">do</cmavo>
</teryruhe>
</pruce>