add scoped_search gem #35
books: index, model, view, layout, form #35

adds user_book_index method to books
adds scoped_search fields
adds book count to views
adds partial for search form
adds search to layout
remove scoped_search gem #35
search for book, author and review #35
search for ratings #35
Style correction #35
Spec, controller and view #35

Refactor search, spec for search, view to show number of found books.