hdf5_ep

[svn-r1311] Changes since 19990607
----------------------

./tools/h5ls.c
./tools/h5tools.c
	Added support for printing bitfields and opaque data.

./test/dsets.c
	Added bitfield and opaque datasets to the output file so h5ls
	has something interesting to print.

./test/trefer.c
	Resync'd

./src/H5Tconv.c
	Fixed bitfield conversion which resulted in possible garbage
	in high-order bits of destination when the destination type is
	larger than the source type. Thanks for spotting it, Quincey.