There are two version numbers
1) version number of the gfsnemsio2grb
2) version number of the public distribution (gfsnemsio2grb+makefile+libraries)


                                  gfsnemsio2grb/*
v2.0   4/2019             Initial public release (7/2019) of code
v2.1   9/2019             apply land mask to TRANS, FLDCP, EVBS, EVCW, WATR
v2.5   6/2020             various updates

                                  Distribution
v1.0   7.2.2019           1st public release
v1.1   7.7.2019           fix typo in makefile, update README
v1.2   9.25.2019          updated to v2.1 of gfsnemsio2grb
v2.5   6/2020