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
I think (and I stress think) that this test only checks that the relationship can exist, not that it must exist. So where is may make sense that a Partner has no OrphanLists, even though the relationship exists, an OrphanList must belong to a partner.