It would be cool if one could download a single file which would
install all the dependencies needed by VIFF. We want to make it as
easy as possible for people to try out VIFF.

This could be an intelligent installer that downloads stuff as needed
from the Internet: first it checks for Python, then for Twisted, etc.
All the dependencies of VIFF allow redistribution, so there should be
no legal problems in doing this.

We might want to use NSIS (Nullsoft Scriptable Install System) which
can create an installer which we can build under Linux, but which
works under Windows:

  http://nsis.sourceforge.net/Main_Page