BabuDB/Java:

enhanced the in-memory-logic interface of the persistence manager; 
integrated persistence manager into LSMDBWorker, to make them suitable for replication; 
enhanced the definition of the plugin compatibility attribute

git-svn-id: https://babudb.googlecode.com/svn/trunk@378 d4c7dd96-b7b2-11dd-893d-d98698f66bbf