Merge pull request #2 from jtong-kata/master

add one page application implement
zy: "delete" function,  not finished yet
Merge branch 'master' of github.com:weixiaobo88/userManagement
zy: add rest api under folder "api"

Using "UsersController" "UsersService" and "UsersDAO"
jtong - merge change conflict in usersList.jsp
Merge branch 'weixiaobo88-master'