Version 2.4-2, 2020-09-12
* Support reading/writing special values (e.g. NA, Inf) without substitution,
mainly in cases where type conversion between R and NetCDF is not required.
* Fix selection of na.mode values 0,1,2
* Fix range checks for numeric conversions with packing
* Significantly increase test coverage of type conversion routines
* Support parallel NetCDF when running with MPI
* Allow creation of datasets in "data64" (CDF5) format
* Support diskless files and in-memory manipulation of persistent files
Version 2.3-1, 2020-04-27
* Fix problem when defining scalar variables with netcdf-4.7.4
Version 2.1-1, 2019-10-18
* Remove automatic handling of fill values in user-defined types
* Link rwinlib libraries by pathname to fix r-hub Windows builds
* Correct quoting of external software names in DESCRIPTION
Version 2.0-4, 2019-10-13
* Fix OSX packages by linking expat library
Version 2.0-3, 2019-10-05
* Support NetCDF-4 features for reading and writing of datasets.
* Suggest bit64 package for NC_INT64 and NC_UINT64 types.
* Drop support for netcdf-3.x library, require netcdf-4.x.
* Drop support for udunits-1 library.
* Disable calendar functions if udunits-2.x is not found during build.
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