Orphan list

First two tasks of PT story https://www.pivotaltracker.com/story/show/76239760

- [x] Create Orphan List model
- [x] Create new and index views for orphan lists
- [ ] Write cucumber features for testing orphan list creation and file upload 
- [ ] Switch to S3 for file storage
What are you testing for here? 
- a relationship that may exist
- or one that must exist?
what I am trying to say is do we need to validate_presence_of for this relationship too?