User can view all playlists

Does the user need to sign in for this test? If not, you can have the playlist automatically create a new user when it is created:

```ruby
factory :playlist do
  title "blah"
  url "http://www.example.com"
  user
end

factory :user do
  sequence(:email) { |n| "foo#{n}@example.com" }
end
```