issue #162

https://github.com/cpfl300/2014_HARU/issues/162

주기적으로 n개를 추출후 halfDayDb에 저장할 수 있는 task 구현
Merge branch 'issue#162' into dev
issue #182

https://github.com/cpfl300/2014_HARU/issues/182

12시간마다 주기적으로 실행되도록 구현
Merge branch 'issue#182' into dev
Merge branch 'dev'