Updated the travis.yml to make the tests run a bit faster.

@@ -6,6 +6,6 @@ python:
     - "3.3"
 env:
     - DJANGO_PACKAGE="Django>=1.5,<1.6"
-    - DJANGO_PACKAGE=git+git://github.com/django/django.git
+    - DJANGO_PACKAGE=https://github.com/django/django/archive/master.zip
 install: pip install $DJANGO_PACKAGE --use-mirrors
 script: python setup.py test