add popup for manual tests (issue #4)

A QInputDialog pops up when a manual test needs to be run. It displays the message sent by the self test. The user can either say that the test passed or failed (and provide a reason why)

![Selection_026](https://f.cloud.github.com/assets/557182/386409/c166a606-a6a5-11e2-9256-1f94716d6d1c.png)