Add contents of HDF5 v1.8.16 RELEASE.txt to HISTORY-1_8.txt. Incremented LT_VERS_REVISION numbers for shared object versions for changing code on 1.8 branch. added rpm spec file hdf5-1.8.16-1-x86_64-szip.spec to bin/pkgscrpts.
Added shared library version numbers for each wrapper library file. Tested with h5committest.new.