Fixed 404/500 errors when entering a URL in the textbox on the redirect
page. It now redirects if it finds the work or reloads the form with
a flash message when it doesn't.
Merge to fix SPR 1111

Conflicts:
	app/controllers/redirect_controller.rb
Merge pull request #1111 from ariana-paris/Issue_3485-Redirect

Issue 3485 - Redirect page gives 500 or 404 error