* Add Admin::BaseController to wrap admin area
Extracts the setting of the `admin` layout and verifying that users are admins
to a common base class for the admin/ controllers.
* Add basic coverage for admin/reports and admin/settings controllers
* Clean up SQL output in Tag and Account search methods
* Add basic coverage for Tag.search_for
* Add coverage for Account.search_for
* Add coverage for Account.advanced_search_for
A request to `/test` would show the custom 404 page, but a request to
`/test.test` would return a 404 with an empty body.
This change ignores the format on incoming catch all route requests, so that the
html 404 page is returned on these requests.
Matt Jankowski