title: No module named query on haystack
body: <p>I was using haystack on my Windows computer, but I realized I needed other modules for my django app that are easier to install on Linux, so I moved to my VirtualBox with Ubuntu. I installed everything with virtualenv in a venv folder. Basically my app uses haystack with a Whoosh backend.
  On view.py, on the import lines, when I do <code>from haystack.query import SearchQuerySet</code> it throws a <code>No module named query</code> error. Any ideas what might be wrong? Here is the entire error. I suspect I'm doing something wrong with the Python path. I installed everything with pip on the virtual env.</p>
  
  <pre><code>Request Method:     GET
  Request URL:    http://127.0.0.1:8000/
  Django Version:     1.4
  Exception Type:     ImportError
  Exception Value:    
  
  No module named query
  
  Exception Location:     /home/app/dj/venv/theme/../theme/views.py in &lt;module&gt;, line 10
  Python Executable:  /home/app/dj/venv/bin/python
  Python Version:     2.7.3
  Python Path:    
  
  ['/home/app/dj/venv/theme',
   '/home/app/dj/venv/local/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg',
   '/home/app/dj/venv/local/lib/python2.7/site-packages/pip-1.1-py2.7.egg',
   '/home/app/dj/venv/lib/python2.7/site-packages/distribute-0.6.24-py2.7.egg',
   '/home/app/dj/venv/lib/python2.7/site-packages/pip-1.1-py2.7.egg',
   '/home/app/dj/venv/lib/python2.7',
   '/home/app/dj/venv/lib/python2.7/plat-linux2',
   '/home/app/dj/venv/lib/python2.7/lib-tk',
   '/home/app/dj/venv/lib/python2.7/lib-old',
   '/home/app/dj/venv/lib/python2.7/lib-dynload',
   '/usr/lib/python2.7',
   '/usr/lib/python2.7/plat-linux2',
   '/usr/lib/python2.7/lib-tk',
   '/home/app/dj/venv/local/lib/python2.7/site-packages',
   '/home/app/dj/venv/lib/python2.7/site-packages']
  </code></pre>