Admin Privileges - Can Delete Any Story

[sorachung]

GIVEN user is authenticated with the user type admin
WHEN is viewing a story's landing page
THEN admin should see a delete button for any story

GIVEN admin wants to delete a story
WHEN admin clicks the delete button
THEN a confirmation dialog should pop up asking admin to confirm

WHEN admin clicks confirm
THEN the story should be deleted from the db and the dialog should go away

WHEN admin clicks cancel
THEN the the dialog should go away and the story untouched in the db