Update and rename list_funcs.cs to Utils.cs

Author: john-h-k

utils/Utils.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections;
+
+public static class Utils
+{
+  public static List<T> addList(List<T> l, params Object[] itemsToAdd)
+  {
+    foreach (item : l)
+    {
+      l.add(item);
+    }
+    return l;
+  }
+}