Fixed web structure.

Fixed the build output, so now the persistence provider is found. Classes are generated and we are happy. Although Denis has to finnish the FillDTO.
Solving serialization issue. (Emf).

Added public no args constructors to controllers. Added dummy asynchronous calls to solve serialization problem. (Hope it works).
Solving entity JoinColumns with compositeKeys.

Added JoinColumns to Comment entity (instead of one JoinColumn there needs to be every column in composite key referrenced within JoinColums {JoinColumn, JoinColumn, ...}
Fixed JDBC not found issue, uncommented password print .. lol.
Clean commit.