bigquery,logging,storage,datastore: mention beta status in doc comment

Change-Id: I69d0a50bca236939d42877f27e4601caf25192ea
Reviewed-on: https://code-review.googlesource.com/9835
Reviewed-by: Ross Light <light@google.com>
Reviewed-by: Chris Broadfoot <cbro@google.com>
diff --git a/bigquery/doc.go b/bigquery/doc.go
index f541b5a..8c2340b 100644
--- a/bigquery/doc.go
+++ b/bigquery/doc.go
@@ -15,7 +15,7 @@
 /*
 Package bigquery provides a client for the BigQuery service.
 
-Note: This package is a work-in-progress.  Backwards-incompatible changes should be expected.
+Note: This package is in beta.  Some backwards-incompatible changes may occur.
 
 The following assumes a basic familiarity with BigQuery concepts.
 See https://cloud.google.com/bigquery/docs.
diff --git a/datastore/doc.go b/datastore/doc.go
index 10102a5..df94b30 100644
--- a/datastore/doc.go
+++ b/datastore/doc.go
@@ -15,6 +15,8 @@
 /*
 Package datastore provides a client for Google Cloud Datastore.
 
+Note: This package is in beta.  Some backwards-incompatible changes may occur.
+
 
 Basic Operations
 
diff --git a/logging/doc.go b/logging/doc.go
index 6da3adf..32ca717 100644
--- a/logging/doc.go
+++ b/logging/doc.go
@@ -20,7 +20,8 @@
 This client uses Logging API v2.
 See https://cloud.google.com/logging/docs/api/v2/ for an introduction to the API.
 
-This package is experimental and subject to API changes.
+
+Note: This package is in beta.  Some backwards-incompatible changes may occur.
 
 
 Creating a Client
diff --git a/logging/logadmin/logadmin.go b/logging/logadmin/logadmin.go
index 6ccd0e0..0a9924d 100644
--- a/logging/logadmin/logadmin.go
+++ b/logging/logadmin/logadmin.go
@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// TODO(jba): link in google.cloud.audit.AuditLog, to support activity logs (after it is published)
-
 // These features are missing now, but will likely be added:
 // - There is no way to specify CallOptions.
 
@@ -24,7 +22,7 @@
 // The client uses Logging API v2.
 // See https://cloud.google.com/logging/docs/api/v2/ for an introduction to the API.
 //
-// This package is experimental and subject to API changes.
+// Note: This package is in beta.  Some backwards-incompatible changes may occur.
 package logadmin // import "cloud.google.com/go/logging/logadmin"
 
 import (
diff --git a/storage/doc.go b/storage/doc.go
index c23f2c8..cf6496b 100644
--- a/storage/doc.go
+++ b/storage/doc.go
@@ -23,7 +23,7 @@
 that fail with certain errors, as described in
 https://cloud.google.com/storage/docs/exponential-backoff.
 
-Note: This package is experimental and may make backwards-incompatible changes.
+Note: This package is in beta.  Some backwards-incompatible changes may occur.
 
 
 Creating a Client