Add travis.yml

Includes pep8, py27 and docs tox environments.

Change-Id: Id260e641d6b282806fb5b62781b4aa756bf1cb2c

Author: markgoddard

.travis.yml

@@ -0,0 +1,34 @@
+---
+language: python
+python: "2.7"
+
+# Run jobs in VMs - sudo is required by ansible tests.
+sudo: required
+
+# Install ansible
+addons:
+  apt:
+    packages:
+      - gcc
+      - python-apt
+      - python-virtualenv
+      - realpath
+
+# Create a build matrix for the different test jobs.
+env:
+  matrix:
+    # Run python style checks.
+    - TOX_ENV=pep8
+    # Build documentation.
+    - TOX_ENV=docs
+    # Run python2.7 unit tests.
+    - TOX_ENV=py27
+
+install:
+  # Install tox in a virtualenv to ensure we have an up to date version.
+  - pip install -U pip
+  - pip install tox
+
+script:
+  # Run the tox environment.
+  - tox -e ${TOX_ENV}