microsoft: add windows live endpoints

Change-Id: I205dfb6c4d693929da799dcba40b3539c6302100
Reviewed-on: https://go-review.googlesource.com/18691
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: brainiac84

microsoft/microsoft.go

@@ -0,0 +1,16 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package microsoft provides constants for using OAuth2 to access Windows Live ID.
+package microsoft // import "golang.org/x/oauth2/microsoft"
+
+import (
+	"golang.org/x/oauth2"
+)
+
+// LiveConnectEndpoint is Windows's Live ID OAuth 2.0 endpoint.
+var LiveConnectEndpoint = oauth2.Endpoint{
+	AuthURL:  "https://login.live.com/oauth20_authorize.srf",
+	TokenURL: "https://login.live.com/oauth20_token.srf",
+}