r417 Upgrade: Elasticsearch Mapping Update

Mapping updated to include last_audit score and date

 Changes to be committed:
	modified:   app/models/concerns/store_searchable.rb
r417 Upgrade: Updating Stores View

Somewhat updated stores view to show a listing. However store_path is not writing the correct URL.

 Changes to be committed:
	modified:   app/controllers/stores_controller.rb
	modified:   app/models/audit.rb
	modified:   app/models/store.rb
	modified:   app/views/stores/_stores.html.erb
	modified:   app/views/stores/search_results.html.erb