Merge pull request #11 from kubernetes-incubator/o3

update travis config

Author: mbohlool

.travis.yml

@@ -2,12 +2,7 @@
 language: python
 python:
   - "2.7"
-  - "3.2"
-  - "3.3"
   - "3.4"
-  - "3.5"
-  #- "3.5-dev" # 3.5 development branch
-  #- "nightly" # points to the latest development branch e.g. 3.6-dev
 # command to install dependencies
 install: "pip install -r requirements.txt"
 # command to run tests