Added support for custom #defines.
Added pointer integer type and applied to all intptr/size_t types.
Added support for config() methods in template roots. This can be used
to register a struct definition that isn't used in any template function.
WindowsDisplay now tracks WM_WINDOWPOSCHANGED.
GLFW - Added support for the native access functions (Win32 only for now).
GLFW - Added GLFW - WGL interop demo.