v1.0    07/02/2019   Initial release
v1.1    07/08/2019   fix type in makefile, executable now in bin/gfsnemsio2grb
                     updated README
v2.5    06/22/2020   update to gfs2nemsio2grb v2.5
v2.5    12/17/2020   update to makefile because wgrib2 3.0.0 has default of shared lib