Adding limit operator and sql rules
Address comments and make limit work across batches
Fix order with limit
Update prepare to exclude Optiq's ENUMERABLE_* rules.  Update Limit and Sort rules to convert as required.  Add test for limit + order by.
Kill incoming batch when limit is met
DRILL-263: PartitionSender not setting opposite minor fragment id correctly
DRILL-242: fix negative hash values, sort order POP case and sending of empty batches with no schema
DRILL-264: MappingSets should not be static
DRILL-230: Build a sampling range partitioner
DRILL-230: Addressing comments in code review, abstract out references to HazelCache and add comments
Add rb/jira review tool
DRILL-45: Implement builders for Scan, Sort, LogicalPlan and PlanProperties.
rebase DRILL-45 to current master
implement SV4 support for filter
DRILL-193: add missing copyright headers
Add Apache License to review tool so RAT doesn't break.
DRILL-256 revised patch
Addressed review comments from Jacques
DRILL-271 retool VectorContainerSerializable to work with containers and batches. also modify DrillSerializable to work with InputStream, OutputStream
DRILL-271 refactor DistributedCache code. Uses hazel cast 3.1 and custom serialization.