simplify default layout+solution
- adding intuitive HTML5 tags like "section" and "header"
- getting rid of css id and class names that suggest styling, like "page-right", "page-left", and "top-menu" so that it would be more natural to shift them around.
- trimming excessive divs, like "bottom-menu" which does little but hold "credit" and "page" which just holds the other sections.
- removing classes from unique elements, like "body", which now has only an id
- representing all links (including *logo) in the wagn way.