Add capability to run PyGriffin from a SON input file.
PyGriffin should be able to parse a SON file to produce a mesh, griffin solver options, material mappings to the PyARC model, and an ISOTXS file.
PyGriffin should be able to parse a SON file to produce a mesh, griffin solver options, material mappings to the PyARC model, and an ISOTXS file.