hdf5_ep

[svn-r1309] Changes since 19990607
----------------------

./tools/h5tools.c
	Finished code which prints references (object and dataset
	region). Patrick, if you tell me how h5dump should (or might
	want to) print references I can make some changes to support
	various formats...

	You can try it out with:

	    cd test
	    env HDF5_NOCLEANUP=yes ./testhdf5
	    ../tools/h5ls -dvr trefer1.h5
	    ../tools/h5ls -dvr trefer2.h5

	(run h5ls with no arguments if you forgot what the switches do)


./test/trefer.c
	Call calloc instead of malloc in one place to prevent
	uninitialized data from being written into the file.