many cleanups to fix compiler warnings, streamline iteration over objects
in HDF5 file when opening the file, and generally straightening out the code
to be cleaner and simpler.
Tested on Mac OS/X with gcc 4.8 and OpenMPI (which uses clang).
with parallel-netcdf, to fully implement parallel-netcdf support for
other functions, and to prevent a hang in hdf5 from an eary return in
an nc4_put_vara() call. Also fixed an nccopy bug when
nc_inq_var_deflate() returns defalate_level of 0, but says the variable
is deflated.
contain as little file-type specific info as possible. It
modifies especially libsrc so that all of the netcdf-3 data
that used to be in struct NC is now kept in a separate chunk
of data pointed to by the struct NC. This makes all of
current protocols consistent: netcdf-3, netcdf-4, and dap.
