Localization internationalization. Fixes #9

@briankip, please review
This feature is complete for **test category** pages.
To review:
1. Change the **locale** in **/app/config/app.php** from the default (**en** ) to **sw** (Swahili).
2. Navigate through the **test category** pages and verify that all page text (*not data*) is displayed in Swahili and not English.