TAJO-869: Sometimes, the unit test of testTaskRunnerHistory is failed. (jinho)
TAJO-916: SubQuery::computeStatFromTasks occasionally fail. (Hyoungjun Kim via hyunsik)

Closes #69
TAJO-932: Upgrade Parquet to 1.5.0.

Closes #67
TAJO-673: Assign proper number of tasks when inserting into partitioned table. (jaehwa)
TAJO-936: TestStorages::testSplitable is failed occasionally. (jinho)
TAJO-904: ORDER BY Null first support. (Hyoungjun Kim via hyunsik)

Closes #70
TAJO-933: Fork some classes of Parquet as builtin third-party classes.

Closes #75
TAJO-20: INSERT INTO ... SELECT. (Hyoungjun Kim via hyunsik)

Closes #72
TAJO-945: Connecting to Tajo by JDBC driver failed with SQL Exception "Invalid JDBC URI". (Mai Hai Thanh via jihoon)
TAJO-953: RawFile should release a DirectBuffer immediately. (jinho)

Closes #79
Fixed wrong table syntax in sphinx doc.
 TAJO-956: CONCAT should be support multiple params and null param. (Hyoungjun Kim via hyunsik)

 Closes #81
TAJO-960: TajoCli's problem does not show the current status.

Closes #83
TAJO-955: Add database selection submit button in catalogview.jsp for text based browse. (Hyoungjun Kim via jihoon)
TAJO-961: TajoCli should exit when at least one query faces error while executing a SQL script. (hyunsik)

Closes #84
TAJO-965: Upgrade Bytes class and move some methods to others.

Closes #86
TAJO-939: Refactoring the column resolver in LogicalPlan.

Closes #71
TAJO-666: java.nio.BufferOverflowException occurs when the query includes an order by clause on a TEXT column. (Mai Hai Thanh via jihoon)
TAJO-972: Broadcast join with left outer join returns duplicated rows.(Hyoungjun Kim via jaehwa)

Closes #89
TAJO-969: Distributed sort on a large data set may result in incorrect results.

Closes #87