Make tests fail early and pass if no boogs

These are two commits that I felt I needed when working on the import refactorings.
I'd make changes that would fail early but nosetest would swallow stdout and leave me hanging until the end (which takes quite some time) - so I added '--stop' to halt tests on first error.
I also changed the youtube 'funny cats' test to 'gangnam style' which as a phrase having 1.5 Billion views for the topmost result seems to be much more robust.