New Versions of rfmig_mcboot.f, rfmig_boot.f, rfmig_mboot.f, rfmig_cboot.f, rfmig_mcbp.f, rfmig_mcbf.f, all with improved handling of larger data sets (500+ events).

Avoided some NaNs in the harmonic-regression calculations.  Earlier versions of the codes included some single-precision computations that led the algorithm into darkness.  Tested with a 1000-record dataset.  The link takes you to the Google Drive folder where the codes reside.