list and map types work now and they support delete. added random tests

src/Types/List.js

@@ -16,9 +16,22 @@
       }
     }
     *insert (pos, contents) {
+      if (typeof pos !== "number") {
+        throw new Error("pos must be a number!");
+      }
+      if (!(contents instanceof Array)) {
+        throw new Error("contents must be an Array of objects!");
+      }
       var t = yield "transaction";
       yield* Y.Struct.List.insert.call(t, this._model, pos, contents);
     }
+    *delete (pos) {
+      if (typeof pos !== "number") {
+        throw new Error("pos must be a number!");
+      }
+      var t = yield "transaction";
+      yield* Y.Struct.List.delete.call(t, this._model, pos);
+    }
   }
 
   Y.List = function* YList(){

src/Types/Map.js

@@ -7,7 +7,16 @@
     *val () {
       var t = yield "transaction";
       var model = yield* t.getOperation(this._model);
-      if (arguments.length === 1) {
+      if (arguments.length === 0) {
+        var res = {};
+        for (var key in model.map) {
+          var v = yield* Y.Struct.Map.get.call(t, model, key);
+          if (v != null) {
+            res[key] = v;
+          }
+        }
+        return res;
+      } else if (arguments.length === 1) {
         return yield* Y.Struct.Map.get.call(t, model, arguments[0]);
       } else if (arguments.length === 2) {
         return yield* Y.Struct.Map.set.call(t, model, arguments[0], arguments[1]);
@@ -15,6 +24,11 @@
         throw new Error("Implement this case!");
       }
     }
+    *delete (key) {
+      var t = yield "transaction";
+      var model = yield* t.getOperation(this._model);
+      yield* Y.Struct.Map.delete.call(t, model, key);
+    }
   }
 
   Y.Map = function* YMap(){