[APPS-1795] Escape addresses to fix XSS vulnerability

:koala: :police_car: 

Before:
![screen shot 2014-09-16 at 1 19 46 pm](https://cloud.githubusercontent.com/assets/2517811/4282086/5ebc3582-3d50-11e4-97f2-8f52e89b9142.png)

After:
![screen shot 2014-09-16 at 1 21 30 pm](https://cloud.githubusercontent.com/assets/2517811/4282107/93d1aa4a-3d50-11e4-82a7-b15f5e5b4dfe.png)

/cc @zendesk/quokka @jwswj @cericksen 

### References
 - Jira link: https://zendesk.atlassian.net/browse/APPS-1795

### Risks
 - None