modified code in search page to allow user to include an empty search string (e.g. so they can specify all subjects that are male regardless of contents of transcript).

Modified code to show search interface at top of page and search results at bottom of page

In course of doing that, decided to comment out simple search and leave only advanced (which is a superset of the simple).

Also modified code to maintain values previously selected in filters.

Also modified code in the locations field so that all tests are against internationalized string value derived from array ($lang->GetEntry('keyword')) rather than literal strings. Will likely implement same sort of thing in the origin and topics fields when I get values for them from Catherine. Required some modification in code doing testing for creation of search query as well.