added builders for bundles and bitstreams

src/app/core/shared/bundle.model.ts

@@ -2,13 +2,14 @@ import { inheritSerialization } from "cerialize";
 import { DSpaceObject } from "./dspace-object.model";
 import { Bitstream } from "./bitstream.model";
 import { Item } from "./item.model";
+import { RemoteData } from "../data/remote-data";
 
 @inheritSerialization(DSpaceObject)
 export class Bundle extends DSpaceObject {
   /**
    * The primary bitstream of this Bundle
    */
-  primaryBitstream: Bitstream;
+  primaryBitstream: RemoteData<Bitstream>;
 
   /**
    * An array of Items that are direct parents of this Bundle
@@ -20,4 +21,6 @@ export class Bundle extends DSpaceObject {
    */
   owner: Item;
 
+  bitstreams: Array<RemoteData<Bitstream>>
+
 }