Add PostRepository
Change hash to list
Merge branch 'master' of https://github.com/j4cksw/geeky-wanz-mini-twitter
Add list operation
Merge branch 'master' of https://github.com/j4cksw/geeky-wanz-mini-twitter

Conflicts:
	pom.xml
Add savePostDataTest
Merge branch 'master' of https://github.com/j4cksw/geeky-wanz-mini-twitter

Conflicts:
	src/main/java/com/geeky/springmvc/domain/PostData.java