Replaced xyzmin, xyzmmax, xyzsum by pmin, pmax, psum. Replaced extent by pmin and pmax in surface
Upgraded three.js from r61 to r62
Replaced xyzmin, xyzmmax, xyzsum by pmin, pmax, psum.
Upgraded node modules express from v3.4.1 to v3.4.2 and spdy from v1.14.7 to v1.14.11