Address first round of review comments on Pull #65, Issue #64.
- Matrix version of scattering() should return matrix< vector<double> >
  not vector< matrix<double> >.
- Some classes missing from ocean.h
- reflect_loss_rough.h missing #include <usml/ocean/wave_height_pierson.h>
- wave_height_pierson_test writes results to *.csv file instead of console.
- Move reflect_loss_netcdf_test to reflect_loss_test.cc from reflect_loss_netcdf_test.cc

Still more work to do on these comments.