Simplified default layout to appear more "modern". The old one was so 1990s.

Added left-side TOC with links to lower level pages.

Hardcoded right left corner &bull; seperators instead of inserting them using
CSS.

Fixed see also generator to honor showAmount parameter.

Removed menuItem, sites should feed menu() a list of link_to's or similar.

Moved few remaining style variables to main.scss. Eventually, styles will be
grouped in files dedicated to various layout elements.