Introduce UAB #whitebar to mw page

The #whitebar content covers the heading content that is backed by the white
area at the top of the body background image.  The space has a total height of 80px.

This space includes the UAB logo (called site logo in uab theme), the search box,
and quick links.  The current mw page has no quick links.

The UAB logo was hard coded as a reference to the brandworks site.

Removed the float: left in #p-search from the vector theme to accomidate the new
positioning on the UAB styled layout, where search is top right.