Shared rasmol code

[Robert Olson]

I've got a first cut at the shared rasmol code working. This is mostly 
entirely new; I'm now using the existing mechanisms within rasmol for 
notifying clients of changes and for setting parameters, instead of adding 
new network handling code. I've just made these mods on the Windows 
version, though adding Linux support will be straightforward (as most of 
the work is in the portable section of the code).

The python code is also structured rather differently, but is much simpler.

Rasmol itself is in the /home/FuturesLab/Software/CVSMaster repo, module 
RasMol. The shared app is in the same repo, module SharedRasmol (yup, just 
two files).

Performance is pretty good; with a lot of events sent there is a noticiable 
latency thru the event channel with just two clients running; running a 
test with just a TCP connection between doesn't show nearly the latency.

--bob