Added .travis.yml

Change-Id: Iff43630b0f17c5d729e03da7a7c4243a3645ec27
Signed-off-by: Stephan Hagemann <stephan.hagemann@instructure.com>
Reviewed-on: https://gerrit.instructure.com/28593
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
Reviewed-by: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>