travis configuration with tox

.travis.yml

@@ -1,22 +1,43 @@
 language: python
 env:
-  - DJANGO_VERSION=1.2.7
-  - DJANGO_VERSION=1.3.7
-  - DJANGO_VERSION=1.4.20
-  - DJANGO_VERSION=1.5.12
-  - DJANGO_VERSION=1.6.11
-  - DJANGO_VERSION=1.7.8
-  - DJANGO_VERSION=1.8.2
+  - DJANGO_VERSION=1.2
+  - DJANGO_VERSION=1.3
+  - DJANGO_VERSION=1.4
+  - DJANGO_VERSION=1.5
+  - DJANGO_VERSION=1.6
+  - DJANGO_VERSION=1.7
+  - DJANGO_VERSION=1.8
 python:
   - "2.7"
   - "3.2"
   - "3.3"
   - "3.4"
+matrix:
+    exclude:
+        - env: DJANGO_VERSION=1.2
+          python: "3.2"
+        - env: DJANGO_VERSION=1.2
+          python: "3.3"
+        - env: DJANGO_VERSION=1.2
+          python: "3.4"
+        - env: DJANGO_VERSION=1.3
+          python: "3.2"
+        - env: DJANGO_VERSION=1.3
+          python: "3.3"
+        - env: DJANGO_VERSION=1.3
+          python: "3.4"
+        - env: DJANGO_VERSION=1.4
+          python: "3.2"
+        - env: DJANGO_VERSION=1.4
+          python: "3.3"
+        - env: DJANGO_VERSION=1.4
+          python: "3.4"
 # command to install dependencies
 install:
   - pip install -q Django==$DJANGO_VERSION
   - pip install -r test-requirements.txt
   - pip install coveralls
 # command to run tests
-script: coverage run setup.py test
+script: 
+    - tox -e py${TRAVIS_PYTHON_VERSION/./}-django${DJANGO_VERSION}
 after_success: coveralls