Add preliminary booklist create and show
Add booklist partial and fixed booklist deletion
Fix user booklist creation when errors
Add create/destroy booklist specs
Fix relationship between User and Book

Removed Booklist model, controller, and specs. Book changed booklist_id
reference to user_id. User and Book specs updated accordingly.
Remove booklist form and factories helper
Implement book create
Implement book destruction and fix Book spec factories
Style book entry form
Fix books authentication
Merge branch 'develop'