export bin_to_radix in libmp since it's used in one of the demo scripts
export bin_to_radix in libmp since it's used in one of the demo scripts

JensGrabner/mpmath,fredrik-johansson/mpmath,klkuhlm/mpmath,bjodah/mpmath,klkuhlm/mpmath,JensGrabner/mpmath,bjodah/mpmath