Produces files in OOGL format containing the information that allows
to visualize an isopotential surface for a given cutoff, from the .cube
file. The OOGL files can be visualized with the "geomview" program:

   $ TARIS-BuildIsosurface -c file [PARAMETERS]

Required parameters:
   -c   file
           This is the name of the cube file containing the electrostatic
           potential data

Optional parameters:
   -b   cutoff
           Potential value for the surface calculation potential data
   -o   output
           Name of the oogl output file

For example:
   $ TARIS-BuildIsosurface -c file.cube -b -0.1 -o file.oogl
   $ geomview -nopanels file.oogl