update WorkloadStatistics to work with new WorkloadStreams abstraction
comment out UniformWindowedOperationStreamExecutorService until it is redesigned
remove OperationClassification_OLD
incremental transistion form OperationClassification_OLD to WorkloadStreams
remote timesource from workload runner
move queue performance micro-benchmark type tests to new class
Merge branch 'master' into parallel_updates
update queue performance tests to be compatible with WorkloadStreams abstraction
add multi iterator top k scanning method
Merge branch 'master' into parallel_updates
add createLimitedWorkloadStream and fromAmongAllRetrieveTopK to WorkloadStreams and integrate into Client to implemented limit(--operation_count) functionality