Fix issues with kD-tree raycasting.
Make using kD-trees ray queries easier with TriangleKdTreeRayQueryNearestHitVisitor. Debug-assert that the tree is built.
Improve TriangleMesh interface. Add support for converting Polyhedrons to TriangleMeshes.
Added unit tests for Ray-TriangleMesh and Ray-kDTree<Triangle> positive and negative intersections.