Merge branch 'master' into develop

Merge branch 'master' into develop

Merge bug-fixes from the v4.1 release into the develop branch.
This merge also connects the v4.1 tag to future development on
the develop branch.

* master:
  Remove "(PRE-RELEASE)" from the version number in the README file
  Add 'modis_15s_lake' option for LANDUSEF data in GEOGRID.TBL.ARW
  eliminate the output=no option to the QNC (cloud drop number concentration) variable
  Update grib tables to add new HRRR fields. Ammend one varaible name.
  Leave old code in g2 library's intmath.f code with comment
  Fix string comparison
  Add configuration stanza for POWER running Linux with XL compilers
  Fix mismatch integer kind in IAND intrinsic calls in g2 library
  Update comments in Vtable.GFS. Add history of important GFS changes.
  Adjust pressure-level RH from GEFS as is done for GFS, CDAS, and ECMWF.
  Add LOGSFP entry to METGRID.TBL.ARW
  Update version number to 4.1