Added code to expose the persistence_diagram class, the bottleneck_distance function and the point class to python. Most of the commonly used methods for each class have been exported. The constructor for point now requires that a data argument be provided along with x and y coord. This needs to be made optional. The constructor for persistence_diagram could possibly be rewritten as well.

#ifndef __PYTHON_BIRTHID_H__
#define __PYTHON_BIRTHID_H__

#include <boost/python.hpp>

namespace dionysus {
namespace python   {

//typedef         int                             BirthID;
//typedef         boost::python::long_            BirthID;
typedef         boost::python::object           BirthID;

} } // namespace dionysus::python

#endif // __PYTHON_BIRTHID_H__