Portuguse Translation

Added the Brazilian Portuguese translation.

Also added a bp_security_check() function as it was causing these errors.

![screenshot_2](https://cloud.githubusercontent.com/assets/2183673/2722030/7ef700b6-c582-11e3-95e7-109bd1c34102.png)
![screenshot_1](https://cloud.githubusercontent.com/assets/2183673/2722031/7f0cbcc6-c582-11e3-99db-427c84917a97.png)