Perl TM now supports XTM

Robert Barta has added XTM support to Perl TM now at version 1.41.

"During the last days I have added - without much enthusiasm, mind you - XTM support, for versions 1.0, 2.0 (and the intermediate 1.1). Especially 1.0 is cumbersome programming. Let's thank the XTM editors for the much simpler version 2. Support means deserialization and serialization, so you should be able to create valid XML instances in all the above flavors."