OPTICKS-1596:Update HDF5 library to latest version.

git-svn-id: svn://svn.code.sf.net/p/opticks/code/trunk/future@18696 6d0fddd1-9640-0410-91f9-aa98d5e64d34
OPTICKS-1597:Fix IntValidator pointer initialization errors


git-svn-id: svn://svn.code.sf.net/p/opticks/code/trunk/future@18697 6d0fddd1-9640-0410-91f9-aa98d5e64d34
Added .gitignore files to match svnignore properties