Added a check for libkdtree
Added a check for libkdtree

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