Upgrade to Grails 2.4.2
Update grails wrapper to 2.4.2
Use a new non-deprecated PostgresqlDialect
Now all integration tests extends from Specification
Upgrade all user types to be Hibernate 4 compatible
Update criterias to be Hibernate 4 compatible
Add coveralls plugin with Travis integration
Update to version 4.x related to Hibernate 4.x
Update README
[Merge #39] Support for Hibernate 4 and Grails 2.4