Tweak Cloud Bigtable information in README.md (#2396)
Tweak Cloud Bigtable information in README.md (#2396)

I believe this doc was originally written for the v1 API and so it referred to creating a cluster rather than an instance. Moreover the link actually took you to the "creating a compute instance" page rather than the "creating a Bigtable instance" page; the latter is more appropriate for this specific text since it's referring to the fact that creating the instance auto-enables the Cloud Bigtable API for the project.
googleapis/google-cloud-node,GoogleCloudPlatform/gcloud-node,googleapis/google-cloud-node,GoogleCloudPlatform/gcloud-node,jgeewax/gcloud-node,jgeewax/gcloud-node,googleapis/google-cloud-node,callmehiphop/gcloud-node,GoogleCloudPlatform/gcloud-node,googleapis/google-cloud-node,callmehiphop/gcloud-node