title: Where is `CV_HAAR_SCALE_IMAGE` in OpenCV 3.1.0 with Python 3.5?
body: <p>I get this error.</p>
  
  <pre><code>AttributeError: module 'cv2' has no attribute 'CV_HAAR_SCALE_IMAGE'
  </code></pre>
  
  <p>After upgrading my OpenCV to 3.1.0.
  I have tried these.</p>
  
  <pre><code>cv2.cv.CV_HAAR_SCALE_IMAGE
  </code></pre>
  
  <p>And also this.</p>
  
  <pre><code>cv2.CV_HAAR_SCALE_IMAGE
  </code></pre>
  
  <p>But still same error. I go here, <a href="http://docs.opencv.org/3.1.0/d9/d31/group__objdetect__c.html#ga812f46d031349fa2ee78a5e7240f5016" rel="noreferrer">http://docs.opencv.org/3.1.0/d9/d31/group__objdetect__c.html#ga812f46d031349fa2ee78a5e7240f5016</a> but I could not find any information of to which object the constants stored in.</p>