Travis config (#1674)

.travis.yml

@@ -0,0 +1,17 @@
+sudo: false
+language: python
+python: 2.7
+
+# tell travis to cache ~/.cache/pip
+cache: pip
+
+env:
+  - TOX_ENV=packaging
+  - TOX_ENV=pep8
+  - TOX_ENV=py27
+
+install:
+  - pip install tox
+
+script:
+  - tox -e $TOX_ENV