Add Travis-CI support

Author: mdboom

.travis.yml

@@ -0,0 +1,13 @@
+sudo: false
+
+language: python
+python:
+  - "2.7"
+  - "3.3"
+  - "3.4"
+  - "3.5"
+  - "3.5-dev" # 3.5 development branch
+# command to install dependencies
+install: "pip install ."
+# command to run tests
+script: nosetests