update tabs classes for jQueryUI 1.9
update menu item highlighting for jQueryUI 1.9
Add support back in for jQueryUI 1.8

I realized I removed the classes that were used by jQueryUI 1.8, so this should now match the tabs for 1.8 and 1.9
accidentally missed one class with 1.8 support
Merge pull request #52 from krische/master

Added support for jQuery UI 1.9