Show failure information

Addresses #800. Disregard the text of the message, that would only happen if no `failure_reason` is given and the status is failed. 

![screenshot from 2013-12-12 13 02 54](https://f.cloud.github.com/assets/1175095/1737287/88bca836-6370-11e3-8e79-730e775c46b9.png)