Set Up Travis for Continuous Integration

Adds Travis CI support for the codemontage application, so we will have an automated, GitHub-integrated way to verify all tests are passing with each new version of the codebase.

[Travis CI](http://en.wikipedia.org/wiki/Travis_CI) is a hosted, distributed continuous integration service used to build and test projects hosted at GitHub. Travis CI is currently [free for all open source projects](http://travis-ci.com/plans).

![travis_ci_-_free_hosted_continuous_integration_platform_for_the_open_source_community_and_alex_gessner-5](https://f.cloud.github.com/assets/226228/2118522/f5c339c0-910d-11e3-8a2b-9b30b48faae6.png)