util:
Ref<>:: Counter fails to be increased sometimes. Example:
  while ( (kart = simulation->getKart(i)) ) {
    top10::util::Ref<top10::graphX::TransformNode> trans(karts[i]);
    trans->setToWorld(getKartTransform(kart));
    ++i;
  }
works, but
  while ( (kart = simulation->getKart(i)) ) {
    top10::util::Ref<top10::graphX::TransformNode> trans; trans = karts[i];
    trans->setToWorld(getKartTransform(kart));
    ++i;
  }
fails.

tracked:
Segfault when picking a mesh when no mesh loaded.
All meshes are of the same color as the grid in tracked on Linux

Top10:
Not sure that the collision response is right.
Sound ugly on win32.

graphX:
top10::math::Meshes used for MeshNode are leaked?


