ec2 query builder & marshaller & unmarshaller (#50)

* implement ec2-marshaller

* enable xml parser to handle resultWrapper and requestId in body; impliment a query-unmarshaller to unmarshal query including ec2

* sort the keys in structure shape

* add httpResponse to ResponseMetadata

* move query-marshaller & query-unmarshaller to protocol-query

Author: AllanZhengYP

packages/types/src/protocol.ts

@@ -16,6 +16,8 @@ export interface Member {
     streaming?: boolean;
     xmlAttribute?: boolean;
     xmlNamespace?: XmlNamespace;
+    queryName?: string;
+    resultWrapper?: string;
 }
 
 export interface Shape {

packages/types/src/response.ts

@@ -1,11 +1,10 @@
-import {HeaderBag} from './http';
+import {HeaderBag, HttpResponse} from './http';
 
 export interface ResponseMetadata {
-    statusCode: number;
+    httpResponse: HttpResponse;
     requestId?: string;
     extendedRequestId?: string;
     cfId?: string;
-    responseHeaders: HeaderBag;
 }
 
 export interface MetadataBearer {