Provide easy access to Delaunay triangles #12
Description
Currently, sites have neighbours, which form Delaunay triangulation. But the library doesn't provide an easy way to iterate these, only site-to-site links per site. This would be very useful for something like mesh generation.
The problem and consideration here is ambiguous cases with 4+ points, where I'm not sure how to best resolve the triangles. So I cannot assume every three neighbour sites form a "triangle" between them, because it could be 4+ under special cases. I anticipate like 10% work to get the triangles and 90% to actually consider and test these edge cases.