Separate RegisteredPointer toWireType implementations between const-, nonconst-, and smartptr implementations.
Optimize embind by avoiding to generate an array for destructors to run after toWireType. Instead, directly generate dtor calls whenever possible.
Implement high-resolution timing in emscripten_get_now() when run in node. Return timing ticks consistently as seconds in all methods.
Remove validateThis since it was also deleted in imvu/emscripten upstream.