- lhillis_essentials_gf830_060721  Fix for gf bug 830 - Attempting to merge an entity after it has been removed now throws IllegalArgumentException. Also, merge(null), persist(null) and contains(null) now throw IllegalArgumentExceptions (all for spec compliance.) 
- gyorke_fix-uow-in-txn-does-not-use-shared-cache_060719.merge_log  Uow no longer begins early transaction if there are no changes 
- lhillis_essentials_gf721_060719  Fix for gf bug 721 - entityManager.find(Class, null) now throws IllegalArgumentException for null PK. 
