Add appropriately filtered destroy action to collections.
Tweak the delete_object helper to also take a second string arg for label text.  CLean up rendering of some stuff on the shared show sets page.
Destroy action now defined in our controller.
Comments out a line that was breaking the edit form.  Note that we weren't setting permissions for files anyhow.
Test updates
Unbreaks edit/update a little bit.  These are still pretty broken tho.
Skip the load and authorize resource hook for destroy action.  Now it works.
Merge pull request #123 from nu-lts/feature/destroy_things

Feature/destroy things