cleaned up remotedata for a better separation of concerns, moved statuscode and errormsg in to RemoteDataError object, moved pageInfo to PaginatedList object in the payload

src/app/core/data/remote-data-error.ts

@@ -0,0 +1,7 @@
+export class RemoteDataError {
+  constructor(
+    public statusCode: string,
+    public message: string
+  ) {
+  }
+}