mostly searchbox revamp + css load order change

mostly searchbox revamp + css load order change

- Removed Evergreen logo from homesearch.tt2, to be replaced (at some
  point) by either a news slideshow, or content sliders (new music,
  movies, books, etc).
- Massive restructuring of searchbar.tt2 and modification of relevant
  bits of tadl.css.
- Did I mention MASSIVE restructuring of searchbar.tt2? There is still
  more to do, but these are the initial changes.
- Changed load order of CSS files, so tadl.css is the last to be loaded
  so it won't be overridden by dojo/dijit.css (dojo.css was overriding
  the body {} for goodness sake!)

Signed-off-by: William Rockwood <wrockwood@tadl.org>