Adding New Content

[ryan-mcneil]

As a Visitor,
When I visit the book index page,
I see a link that allows me to add a new book.
When I click that link, I am taken to a new book path.
I can add a new book through a form, including the book's
title, author(s), and number of pages in the book.
When I submit the form, I am taken to that book's show page.

Book titles should be converted to Title Case before saving.
Book titles should be unique within the system.
For authors, a comma-separated list of names should be entered,
and each author will be added to the database.