Added basic layout.
Configured KnpMenuBundle.
Merge branch 'topic/bundle' into topic/menu

Conflicts:
	app/AppKernel.php
Added MenuEvent.
Added MenuBuilder.
Added service for MenuBuilder.
Added ability to order menu items.
Created main menu.
Created service for main menu.
Merge branch 'topic/layout' into topic/menu
Added main menu to the layout.
Set style for current menu item.
Merge branch 'topic/layout' into dev
Merge branch 'topic/menu' into dev