Changelog

Change history:

* 20210329: Jeff Whitaker (ESRL/PSD):  Fix reading of character arrays (so new
'time_iso' variable can be read from GFS history files). Add slicing
capability for 5d variables.

* 20191207: Jeff Whitaker (ESRL/PSD):  preserve chunksize information in
create_dataset, allow for NF90_FORMAT_64BIT (non-HDF5) formatted files (PR
#2)

* 20191028: Jeff Whitaker (ESRL/PSD):  add has_var, has_attr functions.
Add short, byte, char variables (PR #1).

* 20191025: Hang Lei (NCEP/EMC): Cmake build system.  Need to set compiler
options for specific machine.  For example, on Hera:

cmake -DCMAKE_C_COMPILER=icc -DCMAKE_CXX_COMPILER=icpc \
-DCMAKE_Fortran_COMPILER=ifort \
-DMPI_LIBRARIES=/apps/intel/compilers_and_libraries_2018/linux/mpi/intel64/lib\
-DMPI_INCLUDES=/apps/intel/compilers_and_libraries_2018/linux/mpi/intel64/include\
-DNETCDF_LIBRARY=/apps/netcdf/4.6.1/intel/16.1.150/lib\
-DNETCDF_INCLUDE=/apps/netcdf/4.6.1/intel/16.1.150/include .

cmake --build .

* 20191018: Jeff Whitaker (ESRL/PSD):  Initial version.