Set up travis-CI for automated testing

All it takes is a simple YML file (which I've already pushed directly to `master` and `develop` after testing on my repo).  Everything in this PR is to get the tests running (without a pre-test failure) on `Python 2.6` and `Python 2.7`.

Hoping that Travis-CI will take care of showing the rest (i.e. that this generates true, current test failures!)