Add UI.
Merge branch 'master' of https://github.com/bingluo/survey.git

Conflicts:
	survey/src/SUBMIT_DETAIL_SqlMap.xml
	survey/src/cn/edu/seu/cse/survey/controller/PageController.java
Merge branch 'master' of https://github.com/bingluo/survey.git

Conflicts:
	survey/src/cn/edu/seu/cse/survey/controller/PageController.java
	survey/src/cn/edu/seu/cse/survey/controller/UserController.java
	survey/src/cn/edu/seu/cse/survey/dao/CatalogDAOImpl.java
	survey/src/cn/edu/seu/cse/survey/dao/SubmitDetailDAOImpl.java