made localization available to the users

* Setup the I18n system
* Detect user language
* Add locale switcher to footer

![](https://dl.dropboxusercontent.com/s/28h2c5gauy06ov4/Screenshot%20at%202013-08-15%2022%3A59%3A14.png?token_hash=AAF-Dz47OhJIc6l_H8DymodHKsDlzD09YB-46zTAZSNGXA&dl=1)