Added pan + zoom to diagram viewer; show_diagram() didn't return; added PyQt, PyOpenGL, NumPy as dependencies in the docs
#ifndef __PYTHON_ZIGZAG_PERSISTENCE_H__
#define __PYTHON_ZIGZAG_PERSISTENCE_H__
#include <topology/zigzag-persistence.h>
#include <topology/image-zigzag-persistence.h>
#include <boost/python.hpp>
#include "birthid.h"
namespace dionysus {
namespace python {
typedef ZigzagPersistence<BirthID> ZZPersistence;
typedef ImageZigzagPersistence<BirthID> IZZPersistence;
} } // namespace dionysus::python
#endif