Adding publication picture (if found) to calibration display page
style cleanup
Added fallback node name ({tree}:{id}) for unnamed FCD nodes. Improved logic for tracing ancestry across multiple trees.
cleanup of home page, and refactoring of site announcement into separate PHP fragment
improved fetch page for publication images (detects missing query-string args)
Separate site-wide announcement file (responds to old or new MySQL APIs)
Early version of multi-tree browsing page
Adding dumb advanced-search page (unified-search page as baseline)