Add Travis CI support

The .travis.yml configures Travis CI. We only need Python 2.7 as the
rest is handled by different tox environments. In order to enable
Travis CI, please read http://docs.travis-ci.com/user/getting-started/ and
do step 1) and step 2).

Signed-off-by: Christian Heimes <[email protected]>
Reviewed-by: Simo Sorce <[email protected]>
Closes #11

Author: tiran

.travis.yml

@@ -0,0 +1,21 @@
+language: python
+
+python:
+  - "2.7"
+
+branches:
+  only:
+    - master
+
+install:
+  - pip install tox
+
+script:
+  - tox
+
+env:
+  - TOXENV=py27
+  - TOXENV=py34
+  - TOXENV=doc
+  - TOXENV=sphinx
+