Clarified kdtree as C library
Clarified kdtree as C library

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