TAJO-1006: Measuring the query execution time

https://dbserver.korea.ac.kr/jira/browse/TAJO-1006
Merge pull request #92 from hyunsik/TAJO-1006

TAJO-1006: Measuring the query execution time
TAJO-1007: Resource starvation during the integrating unit test

https://dbserver.korea.ac.kr/jira/browse/TAJO-1007
Merge pull request #93 from hyunsik/TAJO-1007

TAJO-1007: Resource starvation during the integrating unit test
TAJO-1008: Implement a parser rule for an etl statement.

https://dbserver.korea.ac.kr/jira/browse/TAJO-1008
Merge pull request #94 from hyunsik/TAJO-1008

TAJO-1008: Implement a parser rule for an etl statement.
Removed a deprecated README file.
TAJO-1009: Improve CREATE TABLE statement for ETL

https://dbserver.korea.ac.kr/jira/browse/TAJO-1009
Merge pull request #95 from hyunsik/TAJO-1009_PC

TAJO-1009: Improve CREATE TABLE statement for ETL
TAJO-927: Implement ETL feature to load external data onto Tajo storage system

https://dbserver.korea.ac.kr/jira/browse/TAJO-927
Merge pull request #96 from hyunsik/TAJO-927

TAJO-927: Implement ETL feature to load external data onto Tajo storage ...
Merge branch 'master' of github.com:hyunsik/tajo into TAJO-1010

Conflicts:
	tajo-core/tajo-core-storage/src/main/java/tajo/storage/StorageManager.java
	tajo-core/tajo-core-storage/src/main/java/tajo/storage/rcfile/RCFileWrapper.java
Fixed some errors.