More KCL customizations

- remove grey border-bottom on searchbox wrapper on
  homepage.
- added pagename as a class to the body tag so I could
  customize the home page searchbar only, to push it down so
  it would be more centered on the page.
- moved the note about email address to the prefs page where
  you can actually change your email address, rather than the
  prefs page that has nothing to do with email addresses.
- removed line numbers from search results

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