Country favorites

Admin can choose Countries as favorites
![country_favs_01](https://f.cloud.github.com/assets/4713304/1821240/102d0af8-7128-11e3-839b-5fc2a4ce2377.png)
![country_favs_02](https://f.cloud.github.com/assets/4713304/1821241/104f4244-7128-11e3-942c-3e093bb05524.png)
![country_favs_03](https://f.cloud.github.com/assets/4713304/1821242/104f8902-7128-11e3-8986-6facc78410fb.png)