Add html5 shiv for ie<9
Add sidebar menu
Remove sidebar from pages
Various changes

Add slices to slice sidebar vs main content.
Move colophon down.
Add branding in footer
Remove site navigation from header.
Remove navigation script
Various changes

Center content horizontally and vertically.
Create content columns.
Style header.
Style footer.
Style colophon.
Style sidebar menu.
Style content inset.