Updated doxyfile to include libnczarr/zarr.c, also removed references to files that have been removed.
Updated doxyfile to include libnczarr/zarr.c, also removed references to files that have been removed.

Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c