Login working + Fake Test Data + Lot of code cleaning
Not really safe Logout functionality added - TODO: check this
Added Ranking Page working
Get current session user now available
Refactor needed services: BookService - LoanBookService - UserService
Refactor model objects: Book - LoanBook - User - DataFake
Deleted non used images
Fixed BookBuilder - now withRegistrationDate available

Presentation:
-Profile now working with: My borrowed books list - Update profile
-SignIn Page added
-Ranking Page added
-BookListPage Refactored
-Details: now list of comments available - add comment working
Merge pull request #12 from cravacuore/develop

Merging with final changes.