Starting to implement the logic user on the server-side
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/Article.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/Evaluation.java
	new file:   src/main/java/br/ufrn/dimap/pubnote/domain/Friend.java
	new file:   src/main/java/br/ufrn/dimap/pubnote/domain/FriendEntity.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/Profile.java
	new file:   src/main/java/br/ufrn/dimap/pubnote/domain/Tag.java
	new file:   src/main/java/br/ufrn/dimap/pubnote/domain/TagEntity.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/User.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/UserEntity.java
	modified:   src/main/resources/hibernate.cfg.xml