Add 3.4 and 3.5 to travis

.travis.yml

@@ -3,6 +3,8 @@ sudo: false
 python:
   - "2.7"
   - "3.3"
+  - "3.4"
+  - "3.5"
 # command to install dependencies
 install:
   - "pip install -r requirements-dev.txt"