title: Importing opencv and getting numpy.core.multiarray failed to import
body: <p>Trying to install OpenCV and running into an issue where attempting to import cv2 results in this output -</p>
  
  <pre><code>    RuntimeError: module compiled against API version 9 but this version of numpy is 7
  
  Traceback (most recent call last):
  File "&lt;pyshell#4&gt;", line 1, in &lt;module&gt;
  import cv2
  ImportError: numpy.core.multiarray failed to import
  </code></pre>
  
  <p>I'm running on Windows 7 x64, Python v 2.7.9
  Thanks!</p>