Fix up Python 3.2, 3.3, and 3.4 cross-version scanners

Try travis 2.6 and 3.3

.travis.yml

@@ -4,7 +4,11 @@ sudo: false
 
 python:
   - '2.7'
+  - '3.3'
   - '3.4'
 
+install:
+- pip install -r requirements-dev.txt
+
 script:
 - python ./setup.py develop && COMPILE='--compile' make check