Fixed Survey reporting bugs

* Survey::responseJSON mutator was not doing the right thing when
  responseId argument was passed in
* www_viewGradeBook template fixes and documentation

lib/WebGUI/Help/Asset_Survey.pm

@@ -81,6 +81,12 @@ our $HELP = {
             { 'name' => 'question_count' },
             {   'name'      => 'response_loop',
                 'variables' => [
+                    { 'name' => 'response_feedback_url' },
+                    { 'name' => 'response_id' },
+                    { 'name' => 'response_userId' },
+                    { 'name' => 'response_ip' },
+                    { 'name' => 'response_startDate' },
+                    { 'name' => 'response_endDate' },
                     { 'name' => 'response_user_name' },
                     { 'name' => 'response_count_correct' },
                     { 'name' => 'response_percent' }