Proposing some improvements

- Created a controller class for all others controllers extends;
- Puts transition name used by page as a controller attribute;
- Separate menu and content transitions CSS;
- Renames transitions to something more semantic;
- Improve EndTransition Event handler;
- Add a Router to say what controller is invoked by page;
- Modularizes and puts a namespace;
- Improves responsibility delegation (Puts things where they belongs);
- Create  FG.Bootstrap module to prepare environment and start the application.

I guess that's it.