Javascript Version of Rednaxela's KdTree
var KdTree = require('./kdtree.js'),
ManhattanDistanceFunction = require('./manhattan.js');
var tree = new KdTree(2);
for (var i = 0; i < 24; ++i)
tree.addPoint([i, i], i);
var nearest = tree.findNearestNeighbors([5, 7], 3, ManhattanDistanceFunction);