TAJO-1011: Missing 'break clause' in RCFileWrapper.Scanner

https://dbserver.korea.ac.kr/jira/browse/TAJO-1011
Add README file.
Merge pull request #98 from hyunsik/TAJO-1011

TAJO-1011: Missing 'break clause' in RCFileWrapper.Scanner
Merge pull request #99 from hyunsik/TAJO-1013

TAJO-1013: Remove legacy classes and rename classes named temporarily
TAJO-1015: RCFileWrapper.Scanner's projection is incorrect

https://dbserver.korea.ac.kr/jira/browse/TAJO-1015
Merge pull request #101 from hyunsik/TAJO-1015_PC

TAJO-1015: RCFileWrapper.Scanner's projection is incorrect
Merge branch 'master' of github.com:hyunsik/tajo into SM_Refactoring
Removed many duplicated methods and changed some unit tests into Parameterized unit tests.