[svn-r10017] Purpose:

bug fix/new feature.

Description:
(committing changes made by Leon.)
ph5diff now is a real program by itself.  It has its
own main (ph5diff_main.c).
Codes common to h5diff and ph5diff are in h5diff_common.c.

Removed the hack that hide failures from testh5diff.sh.

Platforms tested:
heping(serial, pp), sol (pp), copper(pp).

Misc. update:

tools/h5diff/testh5diff.sh

@@ -127,8 +127,7 @@ TOOLTEST() {
 	    echo " PASSED"
 	else
 	    echo "*FAILED*"
-# still under construction. Don't flag the error.
-#	    nerrors="`expr $nerrors + 1`"
+	    nerrors="`expr $nerrors + 1`"
 	    if test yes = "$verbose"; then
 		echo "    Expected result (*.txt) differs from actual result (*.out)"
 		$DIFF $expect_sorted $actual_sorted |sed 's/^/    /'