title: PyCrypto import AES issue
body: <p>I use AES encryption first time and have that issue, when import AES from <code>Crypto.Cipher</code></p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Users\gek0n\Desktop\wargames\server.py", line 8, in &lt;module&gt;
      from Crypto.Cipher import AES
    File "build\bdist.win-amd64\egg\Crypto\Cipher\AES.py", line 50, in &lt;module&gt;
    File "build\bdist.win-amd64\egg\Crypto\Cipher\_AES.py", line 7, in &lt;module&gt;
    File "build\bdist.win-amd64\egg\Crypto\Cipher\_AES.py", line 4, in __bootstrap__
    File "build\bdist.win-amd64\egg\pkg_resources.py", line 914, in resource_filename
    File "build\bdist.win-amd64\egg\pkg_resources.py", line 1601, in get_resource_filename
    File "build\bdist.win-amd64\egg\pkg_resources.py", line 1629, in _extract_resource
    File "build\bdist.win-amd64\egg\pkg_resources.py", line 990, in get_cache_path
  AttributeError: ResourceManager instance has no attribute '_warn_unsafe_extraction'
  </code></pre>
  
  <p>Someone said, there is a problem with installer, but I used .exe installer for x64 system.
  Someone said, he changed <code>_warn_unsafe_extractor</code> to different name and problem was solved, but could not find this file.</p>
  
  <p>Now I have a new error (after reinstalling PyCrypto with PIP)</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Users\gek0n\Desktop\wargames\server.py", line 8, in &lt;module&gt;
      from Crypto.Cipher import AES
    File "C:\Python27\lib\site-packages\Crypto\Cipher\AES.py", line 50, in &lt;module&gt;
      from Crypto.Cipher import _AES
  ImportError: DLL load failed: %1 не является приложением Win32.
  </code></pre>
  
  <p>I don't know, how to solve this, I'll just describe my actions:</p>
  
  <ol>
  <li>pip uninstall pycrypto</li>
  <li>pip install pycrypto (with error)</li>
  <li>pip install --upgrade pycrypto (with error)</li>
  <li>download and start exe for amd64 (link: <a href="http://www.voidspace.org.uk/python/modules.shtml" rel="nofollow">http://www.voidspace.org.uk/python/modules.shtml</a>)</li>
  <li>Try to import - done!</li>
  </ol>
  
  <p>P.S.
  Before this actions I try to create the environment using a win32 installation, but it is no help!</p>