Commits
Kevin Paul committed f4619ab9245
Adding options for backward compatibility (see below) 1. Adding WITH_PNETCDF to force/require PnetCDF 2. Adding NETCDF_DIR and PNETCDF_DIR checks (that correspondingly set NetCDF_PATH and PnetCDF_PATH) 3. Change PIO_ENABLE_MPIIO to PIO_USE_MPIIO