Add travis build for python 3.4

.travis.yml

@@ -1,7 +1,7 @@
 language: python
 python:
-  - "2.7"
-  
+  - 2.7
+  - 3.4 
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
 install: 
      - "pip install -r requirements.txt"