Patch Rake::Application to handle errors with party_foul

Handle rake task errors with party_foul.

Sample error:

![image](https://cloud.githubusercontent.com/assets/181868/2989152/342ab0a0-dc61-11e3-852a-0eaa38987eec.png)

![image](https://cloud.githubusercontent.com/assets/181868/2989158/3be9c4c0-dc61-11e3-80ba-90e1560d8b08.png)