README.md: news about latest changes

Also, move old news, and add MIGRATION.md and a link to it.

Change-Id: Ia1c2ec7b97f4af75822be010b5f43d37bfe9a834
Reviewed-on: https://code-review.googlesource.com/14450
Reviewed-by: kokoro <[email protected]>
Reviewed-by: Michael Darakananda <[email protected]>
Reviewed-by: Jaana Burcu Dogan <[email protected]>

MIGRATION.md

@@ -0,0 +1,54 @@
+# Code Changes
+
+## v0.10.0
+
+- pubsub: Replace
+
+    ```
+    sub.ModifyPushConfig(ctx, pubsub.PushConfig{Endpoint: "https://example.com/push"})
+    ```
+
+  with
+
+    ```
+    sub.Update(ctx, pubsub.SubscriptionConfigToUpdate{
+        PushConfig: &pubsub.PushConfig{Endpoint: "https://example.com/push"},
+    })
+    ```
+
+- trace: traceGRPCServerInterceptor will be provided from *trace.Client.
+Given an initialized `*trace.Client` named `tc`, instead of
+
+    ```
+    s := grpc.NewServer(grpc.UnaryInterceptor(trace.GRPCServerInterceptor(tc)))
+    ```
+
+  write
+
+    ```
+    s := grpc.NewServer(grpc.UnaryInterceptor(tc.GRPCServerInterceptor()))
+    ```
+
+- trace trace.GRPCClientInterceptor will also provided from *trace.Client.
+Instead of
+
+    ```
+    conn, err := grpc.Dial(srv.Addr, grpc.WithUnaryInterceptor(trace.GRPCClientInterceptor()))
+    ```
+
+  write
+
+    ```
+    conn, err := grpc.Dial(srv.Addr, grpc.WithUnaryInterceptor(tc.GRPCClientInterceptor()))
+    ```
+
+- trace: We removed the deprecated `trace.EnableGRPCTracing`. Use the gRPC
+interceptor as a dial option as shown below when initializing Cloud package
+clients:
+
+    ```
+    c, err := pubsub.NewClient(ctx, "project-id", option.WithGRPCDialOption(grpc.WithUnaryInterceptor(tc.GRPCClientInterceptor())))
+    if err != nil {
+        ...
+    }
+    ```

README.md

@@ -33,21 +33,22 @@ make backwards-incompatible changes.
 
 ## News
 
-_March 17, 2017_
+_June 17, 2017_
 
-Breaking Pubsub changes.
-* Publish is now asynchronous
-([announcement](https://groups.google.com/d/topic/google-api-go-announce/aaqRDIQ3rvU/discussion)).
-* Subscription.Pull replaced by Subscription.Receive, which takes a callback ([announcement](https://groups.google.com/d/topic/google-api-go-announce/8pt6oetAdKc/discussion)).
-* Message.Done replaced with Message.Ack and Message.Nack.
+*v0.10.0*
 
-_February 14, 2017_
+- pubsub: Subscription.ModifyPushConfig replaced with Subscription.Update.
 
-Release of a client library for Spanner. See
-the
-[blog post](https://cloudplatform.googleblog.com/2017/02/introducing-Cloud-Spanner-a-global-database-service-for-mission-critical-applications.html).
+- pubsub: Subscription.Receive now runs concurrently for higher throughput.
 
-Note that although the Spanner service is beta, the Go client library is alpha.
+- vision: cloud.google.com/go/vision is deprecated. Use
+cloud.google.com/go/vision/apiv1 instead.
+
+- translation: now stable.
+
+- trace: several changes to the surface. See the link below.
+
+[Code changes required from v0.9.0.](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/MIGRATION.md)
 
 
 [Older news](https://github.com/GoogleCloudPlatform/google-cloud-go/blob/master/old-news.md)

old-news.md

@@ -1,3 +1,19 @@
+_March 17, 2017_
+
+Breaking Pubsub changes.
+* Publish is now asynchronous
+([announcement](https://groups.google.com/d/topic/google-api-go-announce/aaqRDIQ3rvU/discussion)).
+* Subscription.Pull replaced by Subscription.Receive, which takes a callback ([announcement](https://groups.google.com/d/topic/google-api-go-announce/8pt6oetAdKc/discussion)).
+* Message.Done replaced with Message.Ack and Message.Nack.
+
+_February 14, 2017_
+
+Release of a client library for Spanner. See
+the
+[blog post](https://cloudplatform.googleblog.com/2017/02/introducing-Cloud-Spanner-a-global-database-service-for-mission-critical-applications.html).
+
+Note that although the Spanner service is beta, the Go client library is alpha.
+
 _December 12, 2016_
 
 Beta release of BigQuery, DataStore, Logging and Storage. See the