#15 Update JavaGenerator XMI parsing to version 1.2 (and 1.1?)

[Kjell Petersen]

Support for parsing XMI version 1.2 is requested. (jam5)

Probable cause: Further development of MAGE-OM UML will
be done with tools saving the UML in XMI 1.2 (Poseidon).

A rumour on JavaGenerator that emerged on Jan5 :
JavaGenerator depends on a preprocessing step of Perl
XMI parsing.

This is probably not correct, might have been true in
the past, but the generate_classes/generate_java
directories of JavaGenerator contains java code that
parse the XMI file.

This is probably the code that needs to change...