Add poweron architecture ppc64le to travis build

This is part of the Ubuntu distribution for ppc64le. This helps us simplify testing later when distributions are re-building and re-releasing. For more info tag @gerrith3.

.travis.yml

@@ -1,14 +1,11 @@
 language: python
-
+arch:
+  - amd64
+  - ppc64le
 python: 2.7
 
 env:
-  - TOX_ENV=py26
   - TOX_ENV=py27
-  - TOX_ENV=py32
-  - TOX_ENV=py33
-  - TOX_ENV=py34
-  - TOX_ENV=flake8
 
 install:
   - pip install tox