hdf5_msb

[svn-r946] Changes since 19981121
----------------------

./src/H5Tconv.c
	With my poor eyesight I missed the definitions of SCHAR_MIN
	and SCHAR_MAX in <limits.h> and used CHAR_MIN and CHAR_MAX
	incorrectly. I changed all occurrences of the latter to the
	former and the new hardware integer type conversions now work
	on Irix.

./configure.in
./configure		[REGENERATED]
./src/H5config.h.in	[REGENERATED]
./src/H5private.h
./src/H5.c
./test/h5test.c
	Added a wrapper for HDsnprintf() that just calls sprintf() if
	snprintf() isn't available.

./MANIFEST
	Added Paul's new h5toh4 files.