Adding link to FAQ to Action Bar

Based on frequent requests on [ATE's Google+ Community] (https://plus.google.com/communities/106164413936367578283), a link to the FAQ in the app may help new users.
![ate-faq](https://f.cloud.github.com/assets/5570483/2335879/dfb1bff6-a488-11e3-93c5-4a70f4f55a10.png)
![ate-faq-small](https://f.cloud.github.com/assets/5570483/2335880/dfb2c89c-a488-11e3-850e-2a09e34a9a2c.png)