GLRIDB-347 Search

initial impl of search page unification with the new browse page. it also contains nav back to browse which is an initial impl of urls for the SPA app.
Unless you are trying to be more specific to overcome an already existing style, there is really no point to dubbing up on id specs, since an id must be unique in the page.  Could cause mysterious css breakage later b/c someone might change #nav to something else and then this rule breaks.