Add basic travisci config

Adds a simple config for travis CI to run build. You will need to configure the github [hook](http://docs.travis-ci.com/user/getting-started/#Step-two%3A-Activate-GitHub-Webhook), You can see a sample build here https://travis-ci.org/armooo/savory-pie/builds/29756022 . This will run builds for all pull request making it simpler to accept changes.