test/stressProof
    - Add test for the submergers functionality
   tutorials/proof/runProof
    - Add argument to enable submergers
   tutorials/proof/getProof
    - Add hook to start a valgrind session; this is controlled by the env GETPROOF_VALGRIND (see top of
      the macro for details).


git-svn-id: http://root.cern.ch/svn/root/trunk@31684 27541ba8-7e3a-0410-8455-c3a389f83636