shows a user's stories

There is now a link on a user's show page that links to their stories. I had to cheat rails a bit and actually write the route, rather than passing the prefix to the link_to method.

Also, I changed the routes in the routes.rb file to make them nested. We are working with a lot of routes now, so  things are starting to get complicated. Going to work on creating a new story and linking it back to a user now.