refs #57 do not flatten for now, brings massive performance improveme…

…nt 10min > 1 sec as Referrers_getKeywords takes forever and also leads in memory exhausted when report is flattened

plugins/Insights/API.php

@@ -41,7 +41,8 @@ public function getInsightsOverview($idSite, $period, $date)
             'Actions_getPageTitles',
             'Referrers_getKeywords',
             'Referrers_getCampaigns',
-            'Referrers_getAll'
+            'Referrers_getAll',
+            'Referrers_getSearchEngines'
         );
         // post event to add other reports?
 
@@ -160,7 +161,7 @@ private function requestReport($idSite, $period, $date, $report, $metric, $segme
             'idSite' => $idSite,
             'period' => $period,
             'date'   => $date,
-            'flat'   => 1,
+            'flat'   => 0,
             'filter_limit' => 1000,
             'showColumns'  => $metric
         );