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.

#include "grid2D.h"
#include <iostream>

int main()
{
	Grid2D grid(40,60);
	int i = 0;
	for (int x = 0; x < 40; ++x)
		for (int y = 0; y < 60; ++y)
		{
			grid(x,y) = i++;
		}

	std::cout << grid(20,30) << std::endl;
	std::cout << grid << std::endl;
}