Removed #sidebar-first, #sidebar-first-inner, #sidebar-second, #sidebar-second-inner and moved styles to .region-sidebar-first, .region-sidebar-first .section, .region-sidebar-second, .region-sidebar-second .section.

Renamed #navbar div to #navigation, $navbar region to $navigation, .with-navbar class to .with-navigation and added #navigation .section div

- Added $classes and $classes_array to all templates, not just Zen's templates.
- Renamed page.tpl's $body_classes and $body_classes_array to $classes and $classes_array
- #564068: Views classes are missing from $classes variable