Added pom.xml
Added IntelliJ Idea files to .gitignore
Added Book class.
Added testng and hamcrest-core test dependencies,
Added BookRepository interface and InMemoryBookRepository class that implements it.
Added Google Guava dependency.
 equals and hasCode has overridden for Book.
 Book now is final class.
Added BooksResource.
Added ApplicationConfig (our Composition Root).
Added using of javax.Inject.* annotations.
Moved all packages to ru.pmsoft.jaxrssampleapp.