title: Import Warning: Not Importing Directory issues using wxPython, don't know how to fix
body: <p>I keep getting this warning every time I use wxPython:</p>
  
  <pre><code>Warning (from warnings module):
    File "/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/_core.py", line 14581
      import locale
  ImportWarning: Not importing directory '/usr/local/lib/wxPython-unicode-2.8.12.1/lib/python2.7/site-packages/wx-2.8-mac-unicode/wx/locale': missing __init__.py
  </code></pre>
  
  <p>How do I fix this? I'm using wxPython on Mac. </p>