[APPS-1643] Conditional Locations Sample App

:koala: :+1: 

Conditional Locations Sample App

/cc @zendesk/quokka @maximeprades 

### Screenshots
![screen shot 2014-05-25 at 1 59 56 pm](https://cloud.githubusercontent.com/assets/153219/3087138/0413a2c8-e54e-11e3-899b-ffdc91a4d8b7.png)

### References
 - Jira link: https://zendesk.atlassian.net/browse/APPS-1643

### Risks
 - None