- AddRef/Release where needed
- use IUnknown* instead void*
- fix many GetDevice using AddRef
- fix IDirect3DSurface8Impl_GetContainer using QueryInterface
- beginning of shaders support (Vertex and Pixel Shaders 1.1 on
DirectX8)
- beginning of D3DX8 support the D3D8 utility API (very basic, only
the core header)