[Direct3D11] Fix issue #430. Add D3D11_SO_.* constants to GeometryShader
[tkfxc] Fix issue #429. Add several missing options to tkfxc
[External] Fix issue #431. Get latest assimp and recompile it with V100 platform instead of V110
[SharpDX] Add Up, Down, Left, Right, ForwardRH, ForwardLH, BackwardRH and BackwardLH to Vector3