Remove Python 3 from Travis

Let's not kid ourselves.

.travis.yml

@@ -2,8 +2,6 @@ language: python
 python:
 - '2.6'
 - '2.7'
-- '3.2'
-- '3.3'
 env:
 - DOCKER_VERSION=0.8.0
 - DOCKER_VERSION=0.8.1