User Story 14, Author Show Page

[iandouglas]

As a Visitor,
When I visit an author's show page
I see all books by that author
Each book should show:
- the book title
- the number of pages in the book
- the year the book was published
- a small image of the book cover

Each book should show a list of any other authors
(exclude this show page's author from that list)

DO THESE STORIES FIRST:

• User Story 12, Add a New Book to the System

Checklist:

• base code tests are written
• base code is written to pass tests
• edge case ("sad path") tests written
• edge case code written
• code is reviewed
• branch is merged
• all tests still pass

child of #15

child of #33

depends on #17