Travis

This adds a travis-ci build configuration to run the unit tests. The last build result from my fork can be seen here - https://travis-ci.org/loedolff/dpxdt/builds/11080869  (It will show up under your username if you accept the merge.  You'll also have to log into https://travis-ci.org once using your github credentials, and turn on the service hook for this project at https://travis-ci.org/profile/<username>).

Travis will build next time you commit or push to the repo.

The Travis-ci job could potentially deploy the new version of the application if the build is successful.