* inline some more functions, from math_base and math_vector * also made some changes to the way inline is done so it can work for more than one file * reflect_v3_v3v3 requires input vectors to be normalized now. * added rgb_to_grayscale * added zero_v4, copy_v4_v4, swap_v4_v4, is_one_v3 * added box_clip_bounds_m4 to clip a bounding box against a projection matrix