Update pacakge generation from configuration file

resources/README.md

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+# Package of Google APIs
+
+## Description
+
+This repository contains auto-generated client libraries for accessing 
+Google APIs using dart. It has the usual dart package layout.
+
+## Usage
+
+The first step is to obtain oauth2 access credentials. This can be done using
+the `googleapis_auth` package. Your application can access APIs on behalf of a
+user or using a service account.
+
+After obtaining credentials, an API from the `googleapis` package can be
+accessed with an authenticated HTTP client.
+
+The following is an example of a command line application which lists files
+in Google Drive by using a service account. 
+
+Create a `pubspec.yaml` file with the `googleapis_auth` and `googleapis`
+dependencies.
+
+    ...
+    dependencies:
+      googleapis: any
+      googleapis_auth: any
+
+Create a service account in the Google Cloud Console and save the credential
+information. After that the Cloud Storage API can be accessed like this:
+
+    import 'package:googleapis/storage/v1.dart';
+    import 'package:googleapis_auth/auth_io.dart';
+
+    final Credentials = new ServiceAccountCredentials.fromJson(r'''
+    {
+      "private_key_id": ...,
+      "private_key": ...,
+      "client_email": ...,
+      "client_id": ...,
+      "type": "service_account"
+    }
+    ''');
+
+    void main() {
+      clientViaServiceAccount(Credentials,
+                              [StorageApi.DevstorageReadOnlyScope]).then((http) {
+        var storage = new StorageApi(http);
+        storage.buckets.list('dart-on-cloud').then((buckets) {
+          print("Received ${buckets.items.length} bucket names:");
+          for (var file in buckets.items) {
+            print(file.name);
+          }
+        });
+      });
+    }