Preparing to implement GroupBy linq operator
Identified GroupBy functions requiring GroupByQuery implementation
PartitionSize is now defined in DistributedEnumerable and it is now possible to change it.
Changed implementation of previous query operators to save results immediately to shared storage instead of first passing them to initiator.
Distributed list and dictionary can be serialized without storage property.
First implementation of GroupByQueryOperator.
Prepared code for first group by tests
Basic GroupBy implementation seems to be working correctly
Many corrections, group by still not working.
Hunting bugs.
More bug hunting. Added OpenXES specification