interface since AVX availability is now detected automatically by cmake.

supports them.

normalize_image_gradients(), line, signed_distance_to_line(),
distance_to_line(), reverse(), intersect(), count_points_on_side_of_line(),
count_points_between_lines(), dot(), and normalize() to Python API.

find_bright_lines(), find_dark_lines(), find_dark_keypoints(),
suppress_non_maximum_edges(), and find_peaks() to the Python API.

automatic binding.

added the *_corner() routines to rectangle and drectangle and made these
objects constructable from instances of each other.

their first element.

conversions are attempted.

and convert_image_scaled() to the python API.

parameters were given.

randomly_color_image(), jet(), skeleton(), find_line_endpoints(), get_rect(), shrink_rect(),
grow_rect(), and image_gradients.

improved the way overload resolution works in pybind11 for these objects.