DATACASS-33 - refactored a bunch & ready to begin testing compound primary key support
DATACASS-33 - reduced all of SimpleCassandraRepository's methods to one-liners
DATACASS-33 - simplifying CassandraOperations
DATACASS-33 - minor update to CqlOperations
DATACASS-33 - fixed test classes in preparation for composite primary key testing
Merge branch 'DATACASS-33'