Added functionality to UserManagementController::addUserList,
UserManagementController::removeUserList,
UserManagementController::editUserList.  I had to comment out all three
of these as the User get methods have not yet been implemented.
test
Added functionality to UserManagementController::addToUserList,
UserManagementController::removeFromUserList,
UserManagementController::editUserList.  Code has been commented out due
to no User get methods being implemented yet, would cause issues.