Started the view for seeing documents related to a particular course instance. All it does right now is render a table for all of the documents with a link to download each one. The link goes to the courses controller and tries to do the download_document action. After working on that download_document action, work on adding the search functionality for documents by document_title. Then the add document page. Thankfully, there's no edit document stuff. Then we've gotta do all of the admin stuff. I should probably move some of these actions into their own controller, since stuffing everything in the course controller may get... hard to read eventually.