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 TAJO-1163
Fixed hcatalog compilation failues.
TAJO-1161: Remove joda time dependency from tajo-core. (Jihun Kang via hyunsik)

Closes #233
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/tajo into ThinTajoClient

Conflicts:
	tajo-client/src/main/java/org/apache/tajo/client/TajoClientImpl.java
	tajo-core/src/test/java/org/apache/tajo/client/TestTajoClient.java
	tajo-rpc/pom.xml
Merge branch 'TAJO-1163' of github.com:hyunsik/tajo into ThinTajoClient
Cleaned up source code.