Add scripts to create a book for Rails 4.0
Add a stub of book for Rails 3.2
Move original book to the safe directory
Re-create a book from chapters
Re-create a book from chapters
Fix a regular expression that breaks href tags for Rails 4.0 book
Replace Ruby RE with sed one to fix link bugs
Remove 'navigation' HTML tags for a book
Move shared/_contents to public/books
Refactor and create a book page:

- Move default params from routes to controller
- Create a book page as '/book/ruby-on-rails-tutorial[?version=4.0]'
- Remove needless if statements in View/Controller
Add create_contents.sh to main line
Add a link to 'book' onto header
Make scripts for Rails 4.0 idempotence
Remove needless files: book*.original
Implement scripts to generate a book for 3.2