To provide correct memory menagement

To provide correct memory menagement
So, all descendant of SVTK package should not do care about memory management.
Only simple pointers should be stored (do not use any smart pointers).
The VTK's RenderWindow/Renderer/RenderWindowInteractor/InteractorStyle classes have close conversation and should be destroyed in strict order. Therefore all the memory manemgemnt code was moved to corresponding basic classes.