Fixed issue with date not being rounded to seconds on event add

lib/api/event.js

@@ -136,7 +136,7 @@ event_api.prototype.add_event = function(event, callback){
     }
 
     if(!event['date_happened']){
-        event['date_happened'] = (new Date().getTime()) / 1000;
+        event['date_happened'] = Math.round((new Date()).getTime() / 1000);
     }
 
     if(event['priority']){