Add language preference dropdown, closes #65

Referred to it in text as "Language Preference" and put it under "contact" area — feel free to let me know if it should be in a different place.

Screenshot!
![screen shot 2014-07-25 at 11 28 44 am](https://cloud.githubusercontent.com/assets/994938/3706453/a3c65ef0-1429-11e4-87a5-3a8ea861d82e.png)