Fixed main to point to kdree.node, so that an 'npm install' works.
Fixed main to point to kdree.node, so that an 'npm install' works.

XadillaX/node-kdtree,justinethier/node-kdtree,justinethier/node-kdtree,XadillaX/node-kdtree,XadillaX/node-kdtree,justinethier/node-kdtree,XadillaX/node-kdtree,justinethier/node-kdtree