Add travis file

Author: oschwald

.travis.yml

@@ -0,0 +1,16 @@
+language: python
+python:
+  - 2.6
+  - 2.7
+  - 3.1
+  - 3.2
+  - 3.3
+script: invoke test
+install:
+  - pip install -r requirements.txt
+notifications:
+  email:
+    recipients:
+      - [email protected]
+    on_success: change
+    on_failure: always