Unfortunately, we cannot yet parse the additional hints (plural forms,
cases, parts of speech, etc., everything inside <repr> tags) because the
XML::Simple API does not retain the correct ordering of CDATA content
mixed with subtags... :-/
This also removes the options -SpellTolerance, -Morphology, and
-CharTolerance, which are no longer supported by the new API (as long as
I can see.)
Note that although the XML contains UTF-8 data, XML::Simple decodes
it to latin1, so we have to re-encode it to get good results.
We don't need the headers at all afterwards, but when parsing XML, they
are in the way.
The "found no matches" error is no longer needed in the future.
