Added a Response interface

ref #132

src/models/responses/IResponse.ts

@@ -0,0 +1,13 @@
+import { ResponseObjectType } from '../enums/ResponseObjectType';
+
+/**
+ * Defines the repsonse interface.
+ * This forces all response classes to implement the interfaces properties.
+*/
+export interface IResponse {
+    /**
+    * The responseType.
+    * This contains the type of class/entity this response contains.
+    */
+    responseType: ResponseObjectType;
+}