added mysql and jstl dependency to pom.xml
Created the UserDAO
created  the servlet usersList
preparation of showUser servlet.
correct conflicts in pom.xml and delete testng jar
removed commented code lines
Deleted the duplicated dependency
removed unused import and added serialVersionUID to be able serialize the User bean
Merge pull request #3 from ahzahri/user_servlet_dao_impl

Added a UserList servlet and a DAO implementation