Add root doc.go (#1310)

CHANGELOG.md

@@ -814,4 +814,4 @@ Accomplishing this required renaming various fields and parameters (such as chan
 ## v0.1.0-alpha
 
 This release introduces the Azure Resource Manager packages generated from the corresponding
-[Swagger API](http://swagger.io) [definitions](https://github.com/Azure/azure-rest-api-specs).
+[Swagger API](http://swagger.io) [definitions](https://github.com/Azure/azure-rest-api-specs).

doc.go

@@ -0,0 +1,26 @@
+/*
+Package sdk provides Go packages for managing and using Azure services.
+
+GitHub repo: https://github.com/Azure/azure-sdk-for-go
+
+Official documentation: https://docs.microsoft.com/go/azure
+
+API reference: https://godoc.org/github.com/Azure/azure-sdk-for-go
+
+Samples: https://github.com/Azure-Samples/azure-sdk-for-go-samples
+*/
+package sdk
+
+// Copyright (c) Microsoft and contributors.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.