add styling for yui3-menu-heading. Add inline styling for <ul>, and add width:100% to yui3-menu wrapper
remove .yui3-menu-light, .yui3-menu-dark. Improve hover styling for old IE
bring test page up to date with removal of yui3-menu-light/dark, and addition of .yui3-menu-heading to horizontal lists
add HISTORY.md and include version number in meta/gallerycss-csslist.json for tracking purposes