Merge branch 'feature/python3.5-support' into feature/native-qr

.travis.yml

@@ -1,6 +1,14 @@
 language: python
 sudo: false
 cache: pip
+matrix:
+  include:
+  - python: 2.7
+    env: TOXENV=py27
+  - python: 3.4
+    env: TOXENV=py34
+  - python: 3.5
+    env: TOXENV=py35
 before_install:
     - pip install tox
 # command to run tests