TAJO-725: Broadcast JOIN should supports multiple tables. (hyoungjunkim via jaehwa)
TAJO-739: A subquery with the same column alias caused planning error. (hyoungjunkim via hyunsik)
TAJO-738: NPE occurs when failed in QueryMaster's GlobalPlanner.build(). (hyoungjunkim via hyunsik)
TAJO-728: Supports expression IN statement. (hyunsik)
TAJO-356: Improve TajoClient to directly get query results in the first request. (hyunsik)
TAJO-736: Add table management documentation. (hyunsik)