1. The MC and MD codes basically implement the GUI in the same way, as will
any subsequent codes.  Therefore I think it will be a good idea to abstract
as much of this as possible in order to eliminate a lot of the redundant
coding.  Future codes will import a package called "physics_demos" which
will include abstract classes for the basic code and the canvas.  Specific
demos will implement this class and will be required to override the
run method.  The PhyCanvas method will extend canvas and will also have
a method (plotter()) that must be overridden.  Plotter() will be called
by the paint method.

2. The workhorse sections of the code (Monte() for example) are good subjects
for being written in native code (namely C or Fortran).  This would
be interesting to implement.

3. Another demo:  the gravitational problem.  User would implement the
number and size of each of the objects in the solar system.  Perhaps even
ask the user to implement a "sun" first, or even multiple "suns" which will
be yellow circles.  The user can then imput the number of planets and
can place them initially by pointing and clicking with the mouse.  After
everything has been given initial positions and velocities, the system
is evolved with MD.  At each step the positions are shifted so that the
center of mass is the center of the window frame.