mo_cass.xml: Documented a few tapes in .kci format, currently unsupported in MESS.

The only info that I could find on this obscure format is from the Emul5 source code (emul5src.zip) at http://emul5.thomsonistes.org/download.html, which contains a utility called "WAV2KCI". If anyone wants to take a shot in adding support to MESS, go ahead :-)