Update dependencies

Among others, this updates minio-go, so that the new "eu-west-3" zone
for AWS is supported.

vendor/cloud.google.com/go/internal/protostruct/protostruct.go

@@ -0,0 +1,56 @@
+// Copyright 2017 Google Inc. 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.
+
+// Package protostruct supports operations on the protocol buffer Struct message.
+package protostruct
+
+import (
+	pb "github.com/golang/protobuf/ptypes/struct"
+)
+
+// DecodeToMap converts a pb.Struct to a map from strings to Go types.
+// DecodeToMap panics if s is invalid.
+func DecodeToMap(s *pb.Struct) map[string]interface{} {
+	if s == nil {
+		return nil
+	}
+	m := map[string]interface{}{}
+	for k, v := range s.Fields {
+		m[k] = decodeValue(v)
+	}
+	return m
+}
+
+func decodeValue(v *pb.Value) interface{} {
+	switch k := v.Kind.(type) {
+	case *pb.Value_NullValue:
+		return nil
+	case *pb.Value_NumberValue:
+		return k.NumberValue
+	case *pb.Value_StringValue:
+		return k.StringValue
+	case *pb.Value_BoolValue:
+		return k.BoolValue
+	case *pb.Value_StructValue:
+		return DecodeToMap(k.StructValue)
+	case *pb.Value_ListValue:
+		s := make([]interface{}, len(k.ListValue.Values))
+		for i, e := range k.ListValue.Values {
+			s[i] = decodeValue(e)
+		}
+		return s
+	default:
+		panic("protostruct: unknown kind")
+	}
+}

vendor/cloud.google.com/go/internal/protostruct/protostruct_test.go

@@ -0,0 +1,58 @@
+// Copyright 2017 Google Inc. 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.
+
+// Package protostruct supports operations on the protocol buffer Struct message.
+package protostruct
+
+import (
+	"testing"
+
+	"cloud.google.com/go/internal/testutil"
+	pb "github.com/golang/protobuf/ptypes/struct"
+)
+
+func TestDecodeToMap(t *testing.T) {
+	if got := DecodeToMap(nil); !testutil.Equal(got, map[string]interface{}(nil)) {
+		t.Errorf("DecodeToMap(nil) = %v, want nil", got)
+	}
+	nullv := &pb.Value{&pb.Value_NullValue{}}
+	stringv := &pb.Value{&pb.Value_StringValue{"x"}}
+	boolv := &pb.Value{&pb.Value_BoolValue{true}}
+	numberv := &pb.Value{&pb.Value_NumberValue{2.7}}
+	in := &pb.Struct{Fields: map[string]*pb.Value{
+		"n": nullv,
+		"s": stringv,
+		"b": boolv,
+		"f": numberv,
+		"l": &pb.Value{&pb.Value_ListValue{&pb.ListValue{
+			[]*pb.Value{nullv, stringv, boolv, numberv},
+		}}},
+		"S": &pb.Value{&pb.Value_StructValue{&pb.Struct{Fields: map[string]*pb.Value{
+			"n1": nullv,
+			"b1": boolv,
+		}}}},
+	}}
+	want := map[string]interface{}{
+		"n": nil,
+		"s": "x",
+		"b": true,
+		"f": 2.7,
+		"l": []interface{}{nil, "x", true, 2.7},
+		"S": map[string]interface{}{"n1": nil, "b1": true},
+	}
+	got := DecodeToMap(in)
+	if diff := testutil.Diff(got, want); diff != "" {
+		t.Error(diff)
+	}
+}