Refactored the navigation controls to reflect the new naming.
Added the up and down controls.
Refactored the index and the _getCurrentSection property names.
Added another section with subsections.
Combine all the YUI files, so we can see the other files more easily.
Refactored the code to accommodate for subsections.
Moved around some CSS code.
Collapsed some CSS classes.
Added CSS support for subsections.
Implemented the switching between subsections.