Write wrapper function to make it easy to compute whether a measured spectrum is under the MPE.

Signed-off-by: David Brainard <brainard@psych.upenn.edu>
Added a printout function.  Updated Contents.  A little tuning

These routines are now in good shape.  I don't have any test cases with known answers at my fingertips to validate the code with, but I was pretty careful in trying to follow the standard.

Signed-off-by: David Brainard <brainard@psych.upenn.edu>