including the merge of `hdffv/hdf5/develop`, back to the branch that Vailin and
I share.
Now I need to put this branch on a fork with a less confusing name than
vchoi_fork!
(2) Add two new options to h5repack for low and high bounds as in H5Pset_libver_bounds.
(3) Modify message pre_copy callbacks so that H5Ocopy can handle version bounds check.
(4) Add version bounds check for cache image feature.
