new API for persist

[Stephan Classen]

I added a first version of a new API for onami-persist to the SVN 
repository.
it is located under sandbox/persist/src/sandbox/...

There are also a few samples on how to use the API in the classes 
ApplicationManagedPersistenceUnitSamples and 
ContainerManagedPersistenceUnitSamples

Regards
Stephan