ENORMOUS CHANGES:
- Refractive and Displacement maps are no longer calculated in
  MC-Boost, they now are calculated in KSpaceSolver.  Reasons for this
  are the following.
  1) Data doesn't need to be shuffled around between KSpaceSolver -> MC-Boost
     nearly as much.  Simply added some functions in KSpaceSolver to do the
     computations based on commandline arguments.  Final result is sent to MC-Boost
  2) Removes computation acoustic induced changes to the medium from MC-Boost and
     puts them in KSpaceSolver (where they happen) and now uses OpenMP to speed
     up the process.
  3) Ability to save refractive index changes and displacements for a given run,
     which means reusability between simulations.
  4) Possible to only record certain portions of data over a range of time steps
     by enabling commandline switches.

- Drawbacks are that any change to kWave in the future requires these changes to
  be reinstantiated.

- Updated how refractive index changes are calculated.  Initial results look correct.
- NEEDS TESTING FURTHER TESTING.
  + Look at values computed for delta(n) and displacements.
    Save them using the new save range ability. Do they make sense for input pressures?