added memory data store (actually adding it..)

src/Types/Object.js

@@ -0,0 +1,25 @@
+
+(function(){
+  class Map {
+    constructor (_model) {
+      this._model = _model;
+    }
+    *val () {
+      var transaction = yield "transaction";
+      var model = transaction.getOperation(this._model);
+      if (arguments.length === 0) {
+        throw new Error("Implement this case!");
+      } else if (arguments.length === 1) {
+        return yield* this.Struct.Map.get.call(transaction, model, arguments[0]);
+      } else {
+        return yield* this.Struct.Map.set.call(transaction, model, arguments[0], arguments[1]);
+      }
+    }
+  }
+
+  Y.Map = function* YMap(){
+    var model = yield* this.Struct.map.create.call(this);
+    return new Map(model);
+  };
+  Y.Map.Create = Map;
+})();