finish userindex.gsp. all info display.
fix session.ShiroUserId to session.ShiroUser.id.
fix the dropdown menu for logined user. add the _sidebar.gsp for display user session info.
relate profile to shiroUser,SignupController.groovy/register add the session. set the menu active state.
1.relate profile to shiroUser,when register user, meanwhile add a profile;
2.SignupController.groovy/register add the session;
3.set the menu active state.