title: pycairo "ImportError: DLL load failed: The specified module could not be found." even after DLLs installed
body: <p>I'm following the pycairo installation instructions here : 
  <a href="http://www.cs.rhul.ac.uk/home/tamas/development/igraph/tutorial/install.html" rel="noreferrer">http://www.cs.rhul.ac.uk/home/tamas/development/igraph/tutorial/install.html</a>
  to install pycairo for use with igraph.</p>
  
  <p>However, even after running the installer and unzipping/copying all DLL's into the site-packages cairo directory according to the instructions, I still get the following error:</p>
  
  <p><pre><code>
  >>> import cairo
  Traceback (most recent call last):
    File "", line 1, in 
    File "c:\Python26\lib\site-packages\cairo__init__.py", line 1, in 
      from _cairo import *
  ImportError: DLL load failed: The specified module could not be found.
  >>> 
  </pre></code></p>
  
  <p>I am running python 2.6.6 under Windows 7.</p>
  
  <p>Any ideas?</p>