Add new items to the frameworks list

* [FuelPHP](http://www.fuelphp.com/) - A simple, flexible, community driven PHP 5.3+ framework, based on the best ideas of other frameworks, with a fresh start!
* [Kohana](http://kohanaframework.org/) - An elegant HMVC PHP5 framework that provides a rich set of components for building web applications.
* [PRADO](http://www.pradosoft.com/) - A component-based and event-driven programming framework for developing Web applications in PHP 5.