message: Implement array::begin() const
  No idea how this could work before?!
diff: @@ -114,6 +114,13 @@ inline T* array<T, N>::begin()
  return data_;
  }
  +template <typename T, size_t N>
  +VSNRAY_FUNC
  +inline T const* array<T, N>::begin() const
  +{
  + return data_;
  +}
  +
  template <typename T, size_t N>
  VSNRAY_FUNC
  inline T const* array<T, N>::cbegin() const
  