Restrict testing to Python 2.7

Signed-off-by: Stefan Marr <git@stefan-marr.de>

Author: smarr

.travis.yml

@@ -4,8 +4,8 @@ python:
 #  - "2.6"
   - "2.7"
 #  - "3.2"
-  - "3.3"
-  - "pypy"
+#  - "3.3"
+#  - "pypy"
 
 env:
   - DJANGO_VERSION=1.4.4