TAJO-327: Add testcase to verify TAJO-16. (jaehwa)
TAJO-421: Improve split for compression file. (jinho)
TAJO-418: sort operator after Inline views consisting of unions can cause an incorrect distributed plan. (hyunsik)
TAJO-419: Add missing visitor methods of AlgebraVisitor and BaseAlgebraVisitor. (hyunsik)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into TAJO-338
TAJO-338 - Add Query Optimization Part for Column-Partitioned Tables

 * Moved some algebraic util methods to AlgebraicUtil.
 * Refactored some methods in AlgebraicUtil.
 * Complted PartitionedTableRewrite
Renamed Partitions to PartitionDesc.