title: South migrate error - relation already exists
body: <p>Background:
  After adding djangoratings to my project, I tried running </p>
  
  <pre><code>django-admin.py schemamigration djangoratings --initial 
  --settings=myapp.settings.local 
  </code></pre>
  
  <p>which resulted in an unknown command error for schemamigration.
  I tried to resolve this error by adding my project directory to the PYTHONPATH (I'm using virtualenv  and virtualenvwrapper).
  This resolved the unknown command error for schemamigration, but I think I specified one directory above my project directory for the PYTHONPATH and when the initial migration was run for djangoratings, it complained about something to do with whoosh (which I am using in my project). I changed the PYTHONPATH directory and tried running </p>
  
  <pre><code>django-admin.py schemamigration djangoratings --initial 
  --settings=myapp.settings.local
  </code></pre>
  
  <p>again. Then I ran the migrate command. This is when I received the error:</p>
  
  <pre><code>django.db.utils.DatabaseError: relation "djangoratings_vote" already exists
  </code></pre>
  
  <p>I tried migrating all the way back using:</p>
  
  <pre><code>django-admin.py migrate djangoratings zero --settings=myapp.settings.local
  Running migrations for djangoratings:
  - Migrating backwards to zero state.
  &lt; djangoratings:0006_add_cookies
  &lt; djangoratings:0005_add_exclusions
  &lt; djangoratings:0004_rethink_recommendations
  &lt; djangoratings:0003_add_correlations
  &lt; djangoratings:0002_add_mean_and_stddev
  &lt; djangoratings:0001_initial
  </code></pre>
  
  <p>and then running --initial again, but the same error occurred after performing the migrate command. </p>
  
  <p>I looked at the list of tables in my database and didn't see any for djangoratings_vote. </p>
  
  <p>My current migrations listing for djangoratings is as follows:</p>
  
  <pre><code>0001_initial.py                   0006_add_cookies.py
  0001_initial.pyc                  0006_add_cookies.pyc
  0002_add_mean_and_stddev.py       0007_initial.py
  0002_add_mean_and_stddev.pyc      0007_initial.pyc
  0003_add_correlations.py          0008_initial.py
  0003_add_correlations.pyc         0008_initial.pyc
  0004_rethink_recommendations.py   0009_initial.py
  0004_rethink_recommendations.pyc  0009_initial.pyc
  0005_add_exclusions.py            __init__.py
  0005_add_exclusions.pyc           __init__.pyc
  </code></pre>
  
  <p>How can I resolve the relation "djangoratings_vote" already exists error? Preferably using South? </p>