TAJO-479: Rename obsolete name 'partition' to 'shuffle and fix the broken taskdetail.jsp.
TAJO-476: Add a test development kit for unit tests based on executions of queries.
TAJO-471: Extract ColumnPartitonUtils class for ColumnPartition rewrite. (DaeMyung Kang via hyunsik)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into LogicalPlanRefactor
Add hashCode and equals, and completed dissect.
Improved projections.