TAJO-41 Storage handler name row in storage-default.xml must be rowfile.
TAJO-65: Invalid pom.xml configurations for source directories. (Takuya Ueshin via hyunsik)
TAJO-39 Remove the unused package tajo.engine.plan.global and all files inside the directory.
Revert "TAJO-39 Remove the unused package tajo.engine.plan.global and all files inside the directory."

This reverts commit 64d581f81a6f541401a1d811008a1fe1051d5fc6.
TAJO-39 Remove the unused package tajo.engine.plan.global and all files inside the directory.
Modify CHANGES.txt to record TAJO-39.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into THESIS
TAJO-51: Parallel Container Launch of TaskRunnerLauncherImpl. (hyunsik)
TAJO-14: The ambiguous column error occurs when an alias name is used as a sort key. (hyunsik)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into THESIS

Conflicts:
	tajo-core/tajo-core-backend/src/main/java/tajo/engine/parser/QueryAnalyzer.java
	tajo-core/tajo-core-backend/src/main/java/tajo/master/SubQuery.java
	tajo-core/tajo-core-backend/src/main/java/tajo/master/TaskRunnerEvent.java
	tajo-core/tajo-core-backend/src/main/java/tajo/master/TaskRunnerGroupEvent.java
	tajo-core/tajo-core-backend/src/main/java/tajo/master/TaskRunnerLauncherImpl.java