[netcdfgroup] Using NetCDF-4 C API for parallel I/O in a C++ program

Hello,

It seems to me that netcdf_par.h is missing

#if defined(__cplusplus)
extern "C" {
#endif

...

#if defined(__cplusplus)
}
#endif

pre-compiler directives.

Please consider adding them in the next release.

Thank you!

-- 
Constantine