Add Travis-CI

I'm looking for some projects to add Travis-CI support for. This looked like a good candidate for me. I hope you like it. To get this going you simply need to go to travis-ci.org and sign in with your github login. Then you can browse through your github projects and select Mu to turn it on. Travis will watch all commits and run tests against them for you. If any fail, you will be notified. Also, any future pull requests will be tested and display a passing or failing indicator on them so you can be sure that future pull requests will not break your build.

Thanks!
Joel Byler
joelbyler@gmail.com