hdf5_ep

[svn-r18796] Enhancement 1853:
Install packed-bits feature for h5dump.

tools/h5dump/h5dump.c:
    Added lots of error checking into parse_mask_list() to catch and
    flagged packed-bits argument errors. For now, the packed bits
    are limited to 1 byte (8 bits) range.

tools/h5dump/testh5dump.sh.in
    Added 10 new packed-bits test to verify normal operation and argument
    error detection.

tools/lib/h5tools.h:
tools/lib/h5tools_str.c:
tools/lib/h5tools.c:
    Only name changes of the packed-bit global variables to reflect
    the nature of the variable better, IMO.

Tested: albertPax (linux)
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