Update vendored dependencies

This includes github.com/kurin/blazer 0.2.0, which resolves #1291

vendor/github.com/Azure/azure-sdk-for-go/storage/blobserviceclient.go

@@ -1,9 +1,25 @@
 package storage
 
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
 import (
+	"fmt"
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 )
 
 // BlobStorageClient contains operations for Microsoft Azure Blob Storage
@@ -45,6 +61,21 @@ func (b *BlobStorageClient) GetContainerReference(name string) *Container {
 	}
 }
 
+// GetContainerReferenceFromSASURI returns a Container object for the specified
+// container SASURI
+func GetContainerReferenceFromSASURI(sasuri url.URL) (*Container, error) {
+	path := strings.Split(sasuri.Path, "/")
+	if len(path) <= 1 {
+		return nil, fmt.Errorf("could not find a container in URI: %s", sasuri.String())
+	}
+	cli := newSASClient().GetBlobService()
+	return &Container{
+		bsc:    &cli,
+		Name:   path[1],
+		sasuri: sasuri,
+	}, nil
+}
+
 // ListContainers returns the list of containers in a storage account along with
 // pagination token and other response details.
 //