LP2009865 Revised search result headings & source order

LP2009865 Revised search result headings & source order

Revises the hierarchy of headings in the search results. In combination
with the H1 provided in in bug #1994711, the result is now:

h1. Staff Catalog
h2. Search Results (N)
(repeat for each result:)
h3. [Title] [Author]
h2. Facets
(repeat for each facet box:)
h3. [Facet title]

The source order of the results list and facet sidebar have been
swapped. The facets still appear on the left visually, but now fall
after the results in the document.

Signed-off-by: Stephanie Leary <stephanie.leary@equinoxoli.org>