"character varying" for varchar

...rs from varchar

modified:   src/main/java/br/ufrn/dimap/pubnote/dao/EvaluationDAO.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/ArticleEntity.java
	modified:   src/main/java/br/ufrn/dimap/pubnote/domain/EvaluationEntity.java
	new file:   src/main/java/br/ufrn/dimap/pubnote/hibernate/PubnotesPostgreSQLDialect.java
	modified:   src/main/resources/hibernate.cfg.xml