Z machine

[Leopold Toetsch]

I've here some small parts of a Z machine code translator. It runs not 
much more then a hello-worldish program.

* written in PIR, using objects
* translates Z code files to PIR
* ~ 10 opcodes done
* objects, props, attributes, abbrevs are all missing
I've no time to play with it further, so I'd be glad if someone likes to 
continue hacking on it.

leo