hdf5_msb

[svn-r968] Changes since 19981207
----------------------

./MANIFEST
	Added tcompound2.{dmp,h5} and tdset2.{dmp,h5} used by the
	h5toh4 testing.

./configure.in
./configure		[REGENERATED]
./src/H5config.h.in	[REGENERATED]
	Added check for <sys/timeb.h> for Win32.

	Determines sizeof(char) just so we have a complete list of
	type sizes defined as preprocessor symbols.

./src/H5detect.c
./src/H5T.c
./src/H5Tpkg.h
	Detects alignment constraints. In order for this to work the
	operating system must not correct unaligned data (for
	instance, on the DEC Alpha one might need to say `uac p
	sigbus' before running H5detect).

./src/H5private.h
	Includes <signal.h> because it's needed by H5detect.c to
	detect alignment constraints.

./src/H5Tconv.c
	Added extra checks to all hardware conversion functions so
	they align data when necessary before the conversion.  This
	slows down the conversions somewhat but they're still much
	faster than the software conversions.

./test/dtypes.c
	By setting a constant at the top of the source you can test
	conversions where the data is aligned on various byte
	boundaries.

	By setting a constant at the top of the source you can
	simulate architectures that have alignment constraints on
	architectures that don't.

	Changed typo SIZEOF_LDOUBLE to SIZEOF_LONG_DOUBLE in a few
	places.