add travis file

.travis.yml

@@ -0,0 +1,17 @@
+language: python
+
+python:
+  - "3.4"
+
+env:
+  - TOX_ENV=py26
+  - TOX_ENV=py27
+  - TOX_ENV=py33
+  - TOX_ENV=py34
+
+install:
+  - travis_retry pip install -U pip wheel tox
+  - travis_retry pip install -U -r requirements.txt -e .
+
+script:
+  - tox -e $TOX_ENV