TAJO-1129: Remove hadoop 2.2.0 support. (jinho via hyunsik)

Closes #215
TAJO-1154: TajoCli doesn't pause while running the non-forwarded query. (Hyoungjun Kim via hyunsik)

Closes #227
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into scheduler
TAJO-1157: Required Java version in tutorial doc needs to be updated.

Closes #230
TAJO-1149: Implement direct read of DelimitedTextFile. (jinho)

Closes #221
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into scheduler
TAJO-1128: Implement a select box for database at web interface. (Jongyoung Park via hyunsik)

Closes #222
TAJO-1026: Implement Query history persistency manager.

Closes #179
TAJO-1162: to_char() returns "-00" second.

Closes #234
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into scheduler

Conflicts:
	tajo-core/src/main/java/org/apache/tajo/master/querymaster/QueryInProgress.java
	tajo-core/src/main/java/org/apache/tajo/master/querymaster/QueryUnit.java
	tajo-core/src/main/java/org/apache/tajo/worker/Task.java
	tajo-core/src/main/resources/webapps/admin/query.jsp
TAJO-1161: Remove joda time dependency from tajo-core. (Jihun Kang via hyunsik)

Closes #233
TAJO-1109: Separate SQL Statements from Catalog Stores. (Jihun Kang via hyunsik)

Closes #201
TAJO-1152: RawFile ByteBuffer should be reuse. (jinho)

Closes #224
TAJO-1151: Implement the ByteBuffer-based De/Serializer. (jinho)

Closes #228
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into scheduler