Add register_ptr_to_python to PersistenceDiagram bindings to match changes in Boost.Python
#include <topology/chain.h>
#include "static-persistence.h"
#include "dynamic-persistence.h"
namespace dionysus {
namespace python {
typedef SPersistence::Chain VSPChain;
typedef DPersistenceChains::Chain VDPChain;
} } // namespace dionysus::python