title: OpenCV contours orientation
body: <p>I need to know how oriented (clockwise/counterclockwise) contours after <code>cv2.findContours()</code> function.</p>
  
  <p>I can do it by calling <code>cv2.contourArea()</code> with parameter <code>oriented</code>. But how do it more quickly? Maybe contours alwatys oriented in one direction?</p>
  
  <p>Thanks!</p>