TODO:  make query options (-s -S) have togglable visibility, since they take a lot of room on mob.
FIXME: repalce <select> with custom controls so I can style it, leave <select> in <noscript>
TODO:  decouple PHP from HTML, merge index.pgp and search.php. Just have templates and snippets
       and include those.
TODO:  change GET query vars to be shorter or switch to a different schema