REF WazzaWin model update following some changes
ADD Hibernate ehcache support, C3P0 configuration, PostreSQL DB configuration and a first DAO implementation using JPA persistence model
ADD A simple test class

To test this release: create a postgresql database named wazzadb (or feel free to change the db name, postgres user name and password in service-dao module into the persistence-db.properties file) and launch the tests: mvn test
in this way will be created the entiere database structure corresponding to the WazzaWin model and a simple test inserting a wazza-user.

TODO: complete dao implementation, introduce ehcache.xml config file and write a better and exaustive model and DAO test