bigtable: update readme examples (googleapis#1538)

.github/CONTRIBUTING.md

@@ -26,8 +26,6 @@ To run the system tests, first create and configure a project in the Google Deve
 - **GCLOUD_TESTS_KEY**: The path to the JSON key file.
 - ***GCLOUD_TESTS_API_KEY*** (*optional*): An API key that can be used to test the Translate API.
 - ***GCLOUD_TESTS_DNS_DOMAIN*** (*optional*): A domain you own managed by Google Cloud DNS (expected format: `'gcloud-node.com.'`).
-- ***GCLOUD_TESTS_BIGTABLE_ZONE*** (*optional*): A zone containing a Google Cloud Bigtable cluster.
-- ***GCLOUD_TESTS_BIGTABLE_CLUSTER*** (*optional*): A cluster used to create Bigtable Tables on.
 
 Install the [gcloud command-line tool][gcloudcli] to your machine and use it to create the indexes used in the datastore system tests with indexes found in `system-test/data/index/yaml`:
 

README.md

@@ -213,12 +213,11 @@ var bigtable = require('@google-cloud/bigtable');
 
 var bigtableClient = bigtable({
   projectId: 'grape-spaceship-123',
-  keyFilename: '/path/to/keyfile.json',
-  zone: 'my-zone',
-  cluster: 'my-cluster'
+  keyFilename: '/path/to/keyfile.json'
 });
 
-var table = bigtableClient.table('prezzy');
+var instance = bigtableClient.instance('my-instance');
+var table = instance.table('prezzy');
 
 table.getRows(function(err, rows) {});
 

packages/bigtable/README.md

@@ -15,12 +15,11 @@ $ npm install --save @google-cloud/bigtable
 ```js
 var bigtable = require('@google-cloud/bigtable')({
   projectId: 'grape-spaceship-123',
-  keyFilename: '/path/to/keyfile.json',
-  zone: 'my-zone',
-  cluster: 'my-cluster'
+  keyFilename: '/path/to/keyfile.json'
 });
 
-var table = bigtable.table('prezzy');
+var instance = bigtable.instance('my-instance');
+var table = instance.table('prezzy');
 
 table.getRows(function(err, rows) {});
 
@@ -106,4 +105,4 @@ var bigtable = require('@google-cloud/bigtable')({
 [dev-console]: https://console.developers.google.com/project
 [gcloud-bigtable-docs]: https://googlecloudplatform.github.io/google-cloud-node/#/docs/bigtable
 [cloud-bigtable-docs]: https://cloud.google.com/bigtable/docs
-[cloud-bigtable-cluster]: https://cloud.google.com/bigtable/docs/creating-compute-instance
+[cloud-bigtable-cluster]: https://cloud.google.com/bigtable/docs/creating-compute-instance