update
Description:
Several files have been renamed or moved to a different location.
README => README.txt
RELEASE.txt => release_docs/RELEASE.txt
HISTORY.txt => release_docs/HISTORY.txt
Updated h5vers and release to reflect all these new names/locations.
Also made all uses the same beginning phases for the first line
of text in README.txt and RELEASE.txt as follows:
"HDF5 version ... "
Platforms tested:
eirene by running the bin/release and bin/h5vers -i.
56553a0cb8