Clarify/revise test flow
Hidden field interaction w Capybara
Re-writing 'return to search results' option. No session use.
Use button_to UrlHelper to access last query from 'edit note' view
Feature -- Revise previous search
SearchController#new assigns @tags instead of @tag_list
SearchController#revise
Add, 'revise' route. All SearchController routes should be GET
SearchController#results re-write. No sessions.
verify_tags -- checks that requested tags exist
nil_tags_redirect -- redirects if no tag_list param is passed