vali: added description field
monica, vali: renamed BookToMapper to BookFactory; mapper method should be moved to application layer
monica vali: TODO: this class should not be here
monica vali: renamed userId into currentUserId
monica vali: created bookToMapperTest
Merge master into ExtendedBookDetails
Merge master into ExtendedBookDetails
monica vali: refactored BookToMapper
monica vali: refactored TextFixture
monica vali: refactored BookEntity
extracted BookFactory from BookToMapper
Monica: fix master merge - update BookFacadeImplTest.
monica vali: refactor book
Monica Vali: remove setters from book, use builder instead; clean up book test fixtures.
Monica: add validation to books.
Monica: add link to book in the notification email.
Monica: Merge Extended book details.