Update for Hibernate 4.3

This was a bit of an ambitious change as my first time messing with hibernate-tools source. I first fixed some of the pom versions that were causing issues with the existing - but then it wouldn't compile against Hibernate 4.0.0? Mostly build vs buildServiceRegistry issues in the service registry builder. So I went the whole hog and upgraded to Hibernate 4.3. There is one test failing and that is the AntHibernateToolTest around ejb and jpa... there have been some removals in Hibernate 4.3 that make these harder to get going again.

I'd love to see Hibernate Tools workable again, it is a part of our workflow so we need it. Happy to make any changes etc to this. Is anyone interested in this contribution?