Description: Improved external link traversal of h5dump. h5dump will now
properly avoid all cycles, even those spanning multiple files. Improvement
to the output of committed datatypes. Committed datatypes are now checked
for uniqueness (like other objects). Tests added for these cases.
Tested: kagiso, linew, smirom (h5committest)
Description: Adds capability to h5ls to traverse external links when the -r
(recursive) option is given. Changes to the way absolute path names are patched
in h5trav.c. Changes to the way recursive traversal starting from a non-root
group is handled (which also fixes some preexisting issues). Tests added for
these cases.
Tested: kagiso, smirom, linew (h5committest)
