Reverted on the right django 1.5 rc1 url and made sure we use mirrors for our django downloads.

.travis.yml

@@ -7,9 +7,9 @@ python:
 
 env:
   - DJANGO=https://github.com/django/django/zipball/master
-  - DJANGO=http://optiminformatique.fr/media/Django-1.5c1.tar.gz
-  - DJANGO=django==1.4.3 --use-mirrors
-  - DJANGO=django==1.3.5 --use-mirrors
+  - DJANGO=https://www.djangoproject.com/download/1.5c1/tarball/
+  - DJANGO="django==1.4.3 --use-mirrors"
+  - DJANGO="django==1.3.5 --use-mirrors"
 
 install:
   - pip install $DJANGO