Conditional six installation (only for django 1.3.5) and install 3.2 compatible…

Conditional six installation (only for django 1.3.5) and install 3.2 compatible django-filter for python 3.2 test.

.travis.yml

@@ -14,7 +14,8 @@ env:
 install:
   - pip install $DJANGO
   - pip install django-filter==0.5.4 --use-mirrors
-  - pip install six --use-mirrors
+  - "if [[ $TRAVIS_PYTHON_VERSION == '3.2' ]]; then pip install --upgrade -e git+https://github.com/alex/django-filter.git#egg=django-filter; fi"
+  - "if [[ $DJANGO == 'django==1.3.5 --use-mirrors' ]] then pip install six --use-mirrors; fi"
   - export PYTHONPATH=.
 
 script: