DAO

added DAO with close connection.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/com/naukma/cauliflower/dao/DAO.java
	webapp/src/com/naukma/cauliflower/controllers/LoginController.java
	webapp/src/com/naukma/cauliflower/reports/ReportGeneratorServlet.java