Remove footer from imports

Footer is deleted and therefore it no longer needs to be accessed
Add type photo and type video to stories#destroy
Upload and delete video without affecting photos
Remove variable assignment to video and photo in stories#destroy
Add functionality to links

Donate, volunteer, and contact links now work. Additionally, a user is redirected to sign-up if not logged in and link on 'hero' photo is clicked
Remove repetitive photo link is users#show template
Assign params type to photo and video in stories#destroy