Fixed xterm.py (and cleanup) to clean up screen sessions.
Cleaned up sshd.py (though interface is still in flux.)
Added 1024-node network example (treenet1024.py).
Added example showing multiple tests on a single network (multitest.py).
Renamed examples to make them easier to type!

Minor tweaks to other files.

More edits for INSTALL and README files.
Batteries still not included (for the moment.) ;-)

Added new example to create xterms.
Other minor changes.