Weighing: Add SchemberEventScale

Elwig/Helpers/Weighing/WeighingEventArgs.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace Elwig.Helpers.Weighing {
+    public class WeighingEventArgs : EventArgs {
+
+        public WeighingResult Result { get; set; }
+
+        public WeighingEventArgs(WeighingResult result) {
+            Result = result;
+        }
+    }
+}