delete metadata _itemType; added missing signalr dependencies

bower.json

   "description": "Luticate front utils",
   "license": "MIT",
   "dependencies": {
+    "angular-signalr-hub": "^1.6.2",
+    "signalr": "^2.2.1"
   },
   "ignore": [
     "**/.*",

src/DataAccess/lu-webapi-crud-dataaccess.js

                     delete model.id;
                     delete model.updatedAt;
                     delete model.createdAt;
+                    delete model._itemType;
                     delete model.toString;
                     return model;
                 };