Refactored connection and introduced interfaces for assoc resolver and writer.
Merge branch 'develop' into indexing
Major refactoring of SPI base classes.
Added samples module.
Introduced NumericPhysicalNodeID.
Removed obsolete classes of Mem Binding.
Cosmetics, JavaDoc, Headers.
Cosmetics, JavaDoc, Headers.
add two trivial samples
Introduced MemAssociationResolver.
Introduced MemAssociationWriter and reactivated mem tests.
remove placeholder
revised first two samples
Pulled up close() to interface GraphDataStore.
Added abstract conversation test --> base of compatibility kit.
Update of license headers.
Added compatibility test for mem binding.
Added abstract base for association writers.
Minor logging improvements.
Refacotored transaction handling.