h4h5tools

Purpose:
    a  bug fix
Description:
    HDF4 implicitly supports SDS with array rank 0(A scalar value)(no documentation specified);
    NetCDF also supports this. H4toh5 converter didn't consider this effect.
Solution:
    1. This fix is only for NetCDF file only since ROMS NC file indeed has rank 0 data.
    2. Add several if else blocks to make the rank 0 case convertable. In the mean time,
       also find several bugs related to HDF4 product; file the bug report already.
    [details about the changes, algorithm, etc...]
    [Please as detail as you can since your own explanation is
    better than others guessing it from the code.]
Platforms tested:
    Very hard to use h5cc(in fact, the path to zlib library no longer valid) at solaris 2.7.
    Only test linux redhat 8 and solaris 2.7.
    [machines you have tested the changed version.  This is absolute
    important.  Test it out on at least two or three different platforms
    such as Big-endian-32bit (SUN/IRIX), little-endian-32(LINUX) and
    64-bit (IRIX64/UNICOS/DEC-ALPHA) would be good.]