Add simple Grid - List Wrapper Data Structure

lib/src/Grid.dart

@@ -0,0 +1,22 @@
+import 'dart:core';
+
+import 'package:collection/collection.dart';
+
+class Grid<E> extends DelegatingList<E> {
+  final List<E> _internal;
+  final width;
+  final height;
+
+  Grid(int width, int height) : this._(List<E>(width * height), width, height);
+
+  Grid.from(Grid<E> l)
+      : this._(List<E>.from(l.getRange(0, l.length)), l.width, l.height);
+
+  Grid.fromList(List<E> l, int width) : this._(l, width, l.length ~/ width);
+
+  Grid._(l, int w, int h)
+      : _internal = l,
+        width = w,
+        height = h,
+        super(l);
+}