make travis run tox fixes #72

Author: masci

.travis.yml

@@ -1,14 +1,23 @@
 language: python
-python:
-  - "2.6"
-  - "2.7"
+python: "2.7"
+
+env:
+  - TOX_ENV=py26-django14
+  - TOX_ENV=py26-django15
+  - TOX_ENV=py26-django16
+  - TOX_ENV=py27-django14
+  - TOX_ENV=py27-django15
+  - TOX_ENV=py27-django16
+  - TOX_ENV=py33-django15
+  - TOX_ENV=py33-django16
+  - TOX_ENV=docs
 
 install:
-  - pip install -r requirements/project.txt
+  - pip install tox
   - pip install coveralls
 
 script:
-  - coverage run runtests.py
+  - tox -e $TOX_ENV
 
 after_success:
   - coveralls