hdf5_ep

[svn-r6114] Purpose:
    Code Cleanup & New Feature

Description:
    H5config.h.in:
        Removed H5_HAVE_COMPRESSION & H5_HAVE_FILTER_GZIP flags.

        Added H5_HAVE_FILTER_DEFLATE flag.

    H5Z.c:
    H5Zprivate.h:
    H5Zpublic.h:
        Switched from using H5_HAVE_COMPRESSION flag in favor of
        H5_HAVE_FILTER_DEFLATE.

        Added H5Zunregister & H5Zfilter_avail API functions.

        Changed a numeric constant (256) to a symbolic constant
        (H5Z_FILTER_RESERVED).

        Automatically add the shuffling filter to the list of available filters
        (when it is enabled).

        Moved prototypes for H5Z_filter_deflate & H5Z_filter_shuffle from the
        public header into the private header.

    H5Zdeflate.c:
        Switched from using H5_HAVE_COMPRESSION & H5_HAVE_FILTER_GZIP flags in
        favor of H5_HAVE_FILTER_DEFLATE.

        Cleaned up formatting & error reporting a bit.

    H5Zshuffle.c:
        Rewrote shuffling algorithm to be more efficient.

        Added error checking & reporting.

        Added standard Pablo information.

        Added standard function header comment.

        Added FUNC_ENTER & FUNC_LEAVE macros.

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
        modi4 (parallel, fortran)}
    FreeBSD 4.7 (sleipnir)