Service request를 Command로 빼기 수정,
DAO - DataPool private 추가
7월 20일 영규,희철,태균 통합
Merge branch 'soo' into integrate_7_20

Conflicts:
	Integrated_project_ver5/src/mypkg/command/RecommendCommand.java
filter viewfree
Merge branch 'integrate_7_20'