Starting a feature branch for copying datasets from one IAPP to another

lib/Provisioner.ts

@@ -169,7 +169,10 @@ export interface IDataSet {
   path: string;
   app: IApp;
 
+  copy(dest: IApp): Promise<string>
+
   index(dirs?: boolean): Promise<string[]>;
+
   import_stream(path: string, data: stream.Readable): Promise<string>;
   import_path(path:string): Promise<string>;
   export_stream(path: string): stream.Readable;