[PyWX] Quixote demo example.

[Titus B. <ti...@ca...>]

Hi all,

I've also added 'quixote-example.tcl' and 'quixote_demo.py' underneath
the PyWX/config/ directory in CVS.  These collectively run the Quixote
demo; all you have to do is (a) put quixote_demo.py in your PYTHONPATH
or PyWX path, and (b) 'source' quixote-example.tcl.  See the comments
at the top of the file for more info.

Because Quixote does not yet contain my threadsafety changes, the demo
isn't threadsafe. I'll fix that once 0.6 final is released.

Now, back to messing with DNA...

cheers,
--titus