Enable travis CI support

[JarnoRFB]

The travis.yml file is already there and working. https://travis-ci.org/ support has just to be enabled in the repository settings.

[themightyoarfish]

I guess the usefulness of this is contingent on whether or not I write any tests :p

[JarnoRFB]

Since their are some test it might be also useful to see whether the existing code breaks :D