[hibernate-dev] Move to JPA 2 dependency

[Emmanuel Bernard]

I took a big bet before my vacations, I've migrated Hibernate to JPA  
2.0 Beta1
I had to adjust:
  - annotations
  - entitymanager
  - jbosscache2(*)
  - envers(*)

(*) these were more affected than expected due to http://opensource.atlassian.com/projects/hibernate/browse/ANN-831
Hardy, can you look into that and get it fixed

Hopefully I have not broken too many things. If you really need to, go  
and rollback revision 16522. But I must admit I'd rather get rolled  
forward. Hardy should be back tomorrow and can help on this matter.

http://opensource.atlassian.com/projects/hibernate/browse/ANN-830
http://opensource.atlassian.com/projects/hibernate/browse/EJB-436
http://opensource.atlassian.com/projects/hibernate/browse/HHH-3906

Now on to vacations :)