Move from tox to tox-travis in .travis.yml

.travis.yml

@@ -1,8 +1,9 @@
+sudo: false
 language: python
 python:
   - "2.7"
   - "3.4"
 install:
-  - pip install tox
+  - pip install tox-travis
 script:
   - tox

tox.ini

@@ -6,8 +6,10 @@
 [tox]
 envlist = py27,py34
 
+[tox:travis]
+2.7 = py27
+3.4 = py34
+
 [testenv]
-commands = coverage run manage.py test
-deps =
-     -rrequirements.txt
-     coverage
+commands = python manage.py test
+deps = -rrequirements.txt