URBNG Updated Home Page and Default layout, new database structure (provided by Slick) and few new actions in controllers.

This commit contains:
- Upgraded Play Framework to version 2.1.1 to use Slick (play-slick - https://github.com/freekh/play-slick)
- Added registration form template (without any validation and real action)
- Login form now allows to send login data to redirect to MyGames view but no authentication and validation is set
- Headers in home and default layouts have been changed a bit
- Added configuration and bridges needed to provide Play-Slick 'separated tables schema' (see play-slick Wiki - https://github.com/freekh/play-slick/wiki/Keeping-tables-separated)
- New model classes with Games, Operators and Tasks initial tables (Slick) + simple methods to create or select data
- Added new actions in controllers to get/set data using Json format.

Please consider that there is no tests for this new classes and methods. It will be provided soon.