* fix some fallout from last commit: iconbar now in head.html so no one should call...

* fix some fallout from last commit: iconbar now in head.html so no one should call it themselves
* set WC->logged_in to 0 at the top of do_logout() to surpress iconbar on logout
* Fix IE6 iconbar bug, still not as good as it used to look :(
* Completely rework roombanner etc. so the web browser sizes roombanner, navbar etc. itself
* Added javascript hack so the new roombanner works in browsers that don't do display: table-cell;