another piece in the porting puzzle

I'm happy to report some (limited) progress in porting to Unix: I found Danny Yoo's _Getch at http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/134892

So now it looks like I just need to slug away for a while and get it all to work. I've been thinking about going back to the CompStrm tutorials and revalidating them on Unix.