Manually merged in changes from Task#1727SearchBox branch.
Added search controller.
Added view for search.
Renamed search view to searches.
Rearranged page.
Copied stuff from citations directory, temporarily replacing index.html.erb and bring in subsidiary files.
Removed search results table since it's now on a separate page.
Essentially, we've reverted everything to the master version except some changes to the search form.
Working draft version.
Fixed form target.
Reverted to master version: search-related code is now in search page's controller.
Name change: mysearch --> search
Added checkboxes for searching 'yields' or 'traits'.
Added hidden form field to tag this as an advanced search.
Renamed "search_type" to "search_domain" (yields, traits, or both) and
use "search_type" to distinguish simple from advanced searches.
Altered code to support both types of searches.
Added hidden form field to tag this as a simple search.
Temp save: getting rounding to significant digits and download of CSV files to work.
Added format in query string for download link.
Tweaks to sitename_or_city and mean columns.
Adding files to support combined traits and yields view, refine search panel, and rounding floats to significant digits.
Changed the way @search_domain is handled.
Changes to 'respond_to' block.
Added all column names to 'comma' block.
Always used exactly the view's column names in the CSV header.