Use tox-travis

Author: davehunt

.travis.yml

@@ -1,20 +1,23 @@
 language: python
+python:
+  - 2.6
+  - 2.7
+  - 3.3
+  - 3.4
+  - 3.5
+  - pypy
+  - pypy3
+  - nightly
 env:
-  matrix:
-    - TOXENV=py26-pytest28
-    - TOXENV=py26-pytest29
-    - TOXENV=py27-pytest28
-    - TOXENV=py27-pytest29
-    - TOXENV=py33-pytest28
-    - TOXENV=py33-pytest29
-    - TOXENV=py34-pytest28
-    - TOXENV=py34-pytest29
-    - TOXENV=pypy-pytest28
-    - TOXENV=pypy-pytest29
-    - TOXENV=pypy3-pytest28
-    - TOXENV=pypy3-pytest29
-    - TOXENV=flake8
+  - TOXENV=pytest28
+  - TOXENV=pytest29
+matrix:
+  include:
+    - python: 2.7
+      env: TOXENV=flake8
+    - python: 3.5
+      env: TOXENV=flake8
 install:
-  - pip install tox
+  - pip install tox-travis
 script:
   - tox