Merge pull request #58 from ppkt/fix-travis-python2.6

Update Travis configuration file

.travis.yml

@@ -1,15 +1,28 @@
 language: python
-python: "3.5"
 install: pip install "virtualenv<14.0.0"
 script: python setup.py test
-env:
-  # To generate (update) the env list run
-  # $ tox -l | sort | xargs -I ITEM echo "  - TOXENV="ITEM
-  - TOXENV=flake8
-  - TOXENV=py26
-  - TOXENV=py27
-  # - TOXENV=py32
-  - TOXENV=py33
-  - TOXENV=py34
-  - TOXENV=py35
-  - TOXENV=pypy
+matrix:
+  include:
+  - python: "2.6"
+    env: TOXENV=py26
+
+  - python: "2.7"
+    env: TOXENV=py27
+
+  - python: "3.3"
+    env: TOXENV=py33
+
+  - python: "3.4"
+    env: TOXENV=py34
+
+  - python: "3.4"
+    env: TOXENV=flake8
+
+  - python: "3.5"
+    env: TOXENV=py35
+
+  - python: "3.6"
+    env: TOXENV=py36
+
+  - python: "pypy"
+    env: TOXENV=pypy