h5edit

Bug fix: JPSS-45

doc/RELEASE.txt:
test/testfiles/create-strings.ref:
test/testfiles/version.edit:
    The testh5edit.sh had an output mismatch error for HDF5 V1.8.9 because
    the h5dump of V1.8.9 has a bug fix that affects its output which was
    used by h5dit to verify test output.  The expected output file is
    updated to work with HDF5 v1.8.9.  This change is not backward
    compatible. Therefore, h5edit now expects to work with HDF5 V1.8.9 or
    newer.

src/h5edit.h:
README:
    Updated version information to show it is "under development".

Tested: koala with HDF5 v1.8.9.