New improved version of liquibase-hibernate extension for Liquibase 3.0.4

Features:
- Liquibase 3.0.4
- Hibernate 3.6.10
- Hibernate mapping file hibernate.cfg.xml
- Spring configuration with mapping files *.hbm.xml and annotations
- EJB3
- custom diff to avoid differences due to primary key and unique constraint names, primary keys and unique constraints order. Comparison is case insensitive
- unit tests and integration tests with Hsqldb