transformed Stack to keep deleted particle, until they are pureged

Documentation/Examples/boundary_example.cc

Documentation/Examples/cascade_example.cc

Documentation/Examples/cascade_proton_example.cc

Documentation/Examples/geometry_example.cc

Documentation/Examples/helix_example.cc

Documentation/Examples/particle_list_example.cc

Documentation/Examples/stack_example.cc

Documentation/Examples/staticsequence_example.cc

Documentation/Examples/stopping_power.cc

Documentation/Examples/vertical_EAS.cc

Framework/Cascade/Cascade.h

Framework/Cascade/testCascade.cc

Framework/StackInterface/ParticleBase.h

Framework/StackInterface/SecondaryView.h

Framework/StackInterface/Stack.h

Framework/StackInterface/StackIteratorInterface.h

Framework/StackInterface/testCombinedStack.cc

Framework/StackInterface/testSecondaryView.cc

Framework/StackInterface/testStackInterface.cc

Processes/CONEXSourceCut/CONEXSourceCut.cc