TAJO-94: Remove duplicate proto files. (hyunsik)
TAJO-142: Implement hash anti-join operator. (hyunsik)
TAJO-143: Implement hash semi-join operator. (hyunsik)
TAJO-134: Support for compression/decompression of CSVFile. (jinho)
TAJO-139: In predicate support. (hyunsik)
TAJO-141: Multiple union queries within a table subquery causes NPE. (hyunsik)
TAJO-156: BufferUnderflowException occurs during processing the intermediate file. (jinho)
TAJO-144: Implement INSERT OVERWRITE clause. (hyunsik)
TAJO-157: The CSVScanner.isSplittable() function does not work properly. (jinho)