Fixes issue where unliked book removed from 'all' in addition to 'liked' shelf.
Fixes liked button toggle on 'liked' shelf drag-add.
Adds delete button to shelves.
Adds author index page
Sets up new subsets for liked authors/books, adds quotes index view.
Fixes favorite author view.
Tweaks book show view, quote add form, delete button for shelves.
changes style of login.