diff --git a/vendor/google.golang.org/grpc/reflection/README.md b/vendor/google.golang.org/grpc/reflection/README.md
new file mode 100644
index 0000000..04b6371
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/README.md
@@ -0,0 +1,18 @@
+# Reflection
+
+Package reflection implements server reflection service.
+
+The service implemented is defined in: https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+```go
+import "google.golang.org/grpc/reflection"
+
+s := grpc.NewServer()
+pb.RegisterYourOwnServer(s, &server{})
+
+// Register reflection service on gRPC server.
+reflection.Register(s)
+
+s.Serve(lis)
+```
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go
new file mode 100644
index 0000000..ae5aa7d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.pb.go
@@ -0,0 +1,939 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: grpc_reflection_v1alpha/reflection.proto
+
+package grpc_reflection_v1alpha
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+// The message sent by the client when calling ServerReflectionInfo method.
+type ServerReflectionRequest struct {
+	Host string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
+	// To use reflection service, the client should set one of the following
+	// fields in message_request. The server distinguishes requests by their
+	// defined field and then handles them using corresponding methods.
+	//
+	// Types that are valid to be assigned to MessageRequest:
+	//	*ServerReflectionRequest_FileByFilename
+	//	*ServerReflectionRequest_FileContainingSymbol
+	//	*ServerReflectionRequest_FileContainingExtension
+	//	*ServerReflectionRequest_AllExtensionNumbersOfType
+	//	*ServerReflectionRequest_ListServices
+	MessageRequest       isServerReflectionRequest_MessageRequest `protobuf_oneof:"message_request"`
+	XXX_NoUnkeyedLiteral struct{}                                 `json:"-"`
+	XXX_unrecognized     []byte                                   `json:"-"`
+	XXX_sizecache        int32                                    `json:"-"`
+}
+
+func (m *ServerReflectionRequest) Reset()         { *m = ServerReflectionRequest{} }
+func (m *ServerReflectionRequest) String() string { return proto.CompactTextString(m) }
+func (*ServerReflectionRequest) ProtoMessage()    {}
+func (*ServerReflectionRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{0}
+}
+func (m *ServerReflectionRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServerReflectionRequest.Unmarshal(m, b)
+}
+func (m *ServerReflectionRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServerReflectionRequest.Marshal(b, m, deterministic)
+}
+func (dst *ServerReflectionRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServerReflectionRequest.Merge(dst, src)
+}
+func (m *ServerReflectionRequest) XXX_Size() int {
+	return xxx_messageInfo_ServerReflectionRequest.Size(m)
+}
+func (m *ServerReflectionRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServerReflectionRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServerReflectionRequest proto.InternalMessageInfo
+
+func (m *ServerReflectionRequest) GetHost() string {
+	if m != nil {
+		return m.Host
+	}
+	return ""
+}
+
+type isServerReflectionRequest_MessageRequest interface {
+	isServerReflectionRequest_MessageRequest()
+}
+
+type ServerReflectionRequest_FileByFilename struct {
+	FileByFilename string `protobuf:"bytes,3,opt,name=file_by_filename,json=fileByFilename,proto3,oneof"`
+}
+
+type ServerReflectionRequest_FileContainingSymbol struct {
+	FileContainingSymbol string `protobuf:"bytes,4,opt,name=file_containing_symbol,json=fileContainingSymbol,proto3,oneof"`
+}
+
+type ServerReflectionRequest_FileContainingExtension struct {
+	FileContainingExtension *ExtensionRequest `protobuf:"bytes,5,opt,name=file_containing_extension,json=fileContainingExtension,proto3,oneof"`
+}
+
+type ServerReflectionRequest_AllExtensionNumbersOfType struct {
+	AllExtensionNumbersOfType string `protobuf:"bytes,6,opt,name=all_extension_numbers_of_type,json=allExtensionNumbersOfType,proto3,oneof"`
+}
+
+type ServerReflectionRequest_ListServices struct {
+	ListServices string `protobuf:"bytes,7,opt,name=list_services,json=listServices,proto3,oneof"`
+}
+
+func (*ServerReflectionRequest_FileByFilename) isServerReflectionRequest_MessageRequest() {}
+
+func (*ServerReflectionRequest_FileContainingSymbol) isServerReflectionRequest_MessageRequest() {}
+
+func (*ServerReflectionRequest_FileContainingExtension) isServerReflectionRequest_MessageRequest() {}
+
+func (*ServerReflectionRequest_AllExtensionNumbersOfType) isServerReflectionRequest_MessageRequest() {}
+
+func (*ServerReflectionRequest_ListServices) isServerReflectionRequest_MessageRequest() {}
+
+func (m *ServerReflectionRequest) GetMessageRequest() isServerReflectionRequest_MessageRequest {
+	if m != nil {
+		return m.MessageRequest
+	}
+	return nil
+}
+
+func (m *ServerReflectionRequest) GetFileByFilename() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileByFilename); ok {
+		return x.FileByFilename
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetFileContainingSymbol() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileContainingSymbol); ok {
+		return x.FileContainingSymbol
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetFileContainingExtension() *ExtensionRequest {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_FileContainingExtension); ok {
+		return x.FileContainingExtension
+	}
+	return nil
+}
+
+func (m *ServerReflectionRequest) GetAllExtensionNumbersOfType() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_AllExtensionNumbersOfType); ok {
+		return x.AllExtensionNumbersOfType
+	}
+	return ""
+}
+
+func (m *ServerReflectionRequest) GetListServices() string {
+	if x, ok := m.GetMessageRequest().(*ServerReflectionRequest_ListServices); ok {
+		return x.ListServices
+	}
+	return ""
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ServerReflectionRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ServerReflectionRequest_OneofMarshaler, _ServerReflectionRequest_OneofUnmarshaler, _ServerReflectionRequest_OneofSizer, []interface{}{
+		(*ServerReflectionRequest_FileByFilename)(nil),
+		(*ServerReflectionRequest_FileContainingSymbol)(nil),
+		(*ServerReflectionRequest_FileContainingExtension)(nil),
+		(*ServerReflectionRequest_AllExtensionNumbersOfType)(nil),
+		(*ServerReflectionRequest_ListServices)(nil),
+	}
+}
+
+func _ServerReflectionRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ServerReflectionRequest)
+	// message_request
+	switch x := m.MessageRequest.(type) {
+	case *ServerReflectionRequest_FileByFilename:
+		b.EncodeVarint(3<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.FileByFilename)
+	case *ServerReflectionRequest_FileContainingSymbol:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.FileContainingSymbol)
+	case *ServerReflectionRequest_FileContainingExtension:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.FileContainingExtension); err != nil {
+			return err
+		}
+	case *ServerReflectionRequest_AllExtensionNumbersOfType:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.AllExtensionNumbersOfType)
+	case *ServerReflectionRequest_ListServices:
+		b.EncodeVarint(7<<3 | proto.WireBytes)
+		b.EncodeStringBytes(x.ListServices)
+	case nil:
+	default:
+		return fmt.Errorf("ServerReflectionRequest.MessageRequest has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ServerReflectionRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ServerReflectionRequest)
+	switch tag {
+	case 3: // message_request.file_by_filename
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_FileByFilename{x}
+		return true, err
+	case 4: // message_request.file_containing_symbol
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_FileContainingSymbol{x}
+		return true, err
+	case 5: // message_request.file_containing_extension
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ExtensionRequest)
+		err := b.DecodeMessage(msg)
+		m.MessageRequest = &ServerReflectionRequest_FileContainingExtension{msg}
+		return true, err
+	case 6: // message_request.all_extension_numbers_of_type
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_AllExtensionNumbersOfType{x}
+		return true, err
+	case 7: // message_request.list_services
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		x, err := b.DecodeStringBytes()
+		m.MessageRequest = &ServerReflectionRequest_ListServices{x}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ServerReflectionRequest_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ServerReflectionRequest)
+	// message_request
+	switch x := m.MessageRequest.(type) {
+	case *ServerReflectionRequest_FileByFilename:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.FileByFilename)))
+		n += len(x.FileByFilename)
+	case *ServerReflectionRequest_FileContainingSymbol:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.FileContainingSymbol)))
+		n += len(x.FileContainingSymbol)
+	case *ServerReflectionRequest_FileContainingExtension:
+		s := proto.Size(x.FileContainingExtension)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionRequest_AllExtensionNumbersOfType:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.AllExtensionNumbersOfType)))
+		n += len(x.AllExtensionNumbersOfType)
+	case *ServerReflectionRequest_ListServices:
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(len(x.ListServices)))
+		n += len(x.ListServices)
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// The type name and extension number sent by the client when requesting
+// file_containing_extension.
+type ExtensionRequest struct {
+	// Fully-qualified type name. The format should be <package>.<type>
+	ContainingType       string   `protobuf:"bytes,1,opt,name=containing_type,json=containingType,proto3" json:"containing_type,omitempty"`
+	ExtensionNumber      int32    `protobuf:"varint,2,opt,name=extension_number,json=extensionNumber,proto3" json:"extension_number,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ExtensionRequest) Reset()         { *m = ExtensionRequest{} }
+func (m *ExtensionRequest) String() string { return proto.CompactTextString(m) }
+func (*ExtensionRequest) ProtoMessage()    {}
+func (*ExtensionRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{1}
+}
+func (m *ExtensionRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExtensionRequest.Unmarshal(m, b)
+}
+func (m *ExtensionRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExtensionRequest.Marshal(b, m, deterministic)
+}
+func (dst *ExtensionRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExtensionRequest.Merge(dst, src)
+}
+func (m *ExtensionRequest) XXX_Size() int {
+	return xxx_messageInfo_ExtensionRequest.Size(m)
+}
+func (m *ExtensionRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExtensionRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExtensionRequest proto.InternalMessageInfo
+
+func (m *ExtensionRequest) GetContainingType() string {
+	if m != nil {
+		return m.ContainingType
+	}
+	return ""
+}
+
+func (m *ExtensionRequest) GetExtensionNumber() int32 {
+	if m != nil {
+		return m.ExtensionNumber
+	}
+	return 0
+}
+
+// The message sent by the server to answer ServerReflectionInfo method.
+type ServerReflectionResponse struct {
+	ValidHost       string                   `protobuf:"bytes,1,opt,name=valid_host,json=validHost,proto3" json:"valid_host,omitempty"`
+	OriginalRequest *ServerReflectionRequest `protobuf:"bytes,2,opt,name=original_request,json=originalRequest,proto3" json:"original_request,omitempty"`
+	// The server sets one of the following fields according to the
+	// message_request in the request.
+	//
+	// Types that are valid to be assigned to MessageResponse:
+	//	*ServerReflectionResponse_FileDescriptorResponse
+	//	*ServerReflectionResponse_AllExtensionNumbersResponse
+	//	*ServerReflectionResponse_ListServicesResponse
+	//	*ServerReflectionResponse_ErrorResponse
+	MessageResponse      isServerReflectionResponse_MessageResponse `protobuf_oneof:"message_response"`
+	XXX_NoUnkeyedLiteral struct{}                                   `json:"-"`
+	XXX_unrecognized     []byte                                     `json:"-"`
+	XXX_sizecache        int32                                      `json:"-"`
+}
+
+func (m *ServerReflectionResponse) Reset()         { *m = ServerReflectionResponse{} }
+func (m *ServerReflectionResponse) String() string { return proto.CompactTextString(m) }
+func (*ServerReflectionResponse) ProtoMessage()    {}
+func (*ServerReflectionResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{2}
+}
+func (m *ServerReflectionResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServerReflectionResponse.Unmarshal(m, b)
+}
+func (m *ServerReflectionResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServerReflectionResponse.Marshal(b, m, deterministic)
+}
+func (dst *ServerReflectionResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServerReflectionResponse.Merge(dst, src)
+}
+func (m *ServerReflectionResponse) XXX_Size() int {
+	return xxx_messageInfo_ServerReflectionResponse.Size(m)
+}
+func (m *ServerReflectionResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServerReflectionResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServerReflectionResponse proto.InternalMessageInfo
+
+func (m *ServerReflectionResponse) GetValidHost() string {
+	if m != nil {
+		return m.ValidHost
+	}
+	return ""
+}
+
+func (m *ServerReflectionResponse) GetOriginalRequest() *ServerReflectionRequest {
+	if m != nil {
+		return m.OriginalRequest
+	}
+	return nil
+}
+
+type isServerReflectionResponse_MessageResponse interface {
+	isServerReflectionResponse_MessageResponse()
+}
+
+type ServerReflectionResponse_FileDescriptorResponse struct {
+	FileDescriptorResponse *FileDescriptorResponse `protobuf:"bytes,4,opt,name=file_descriptor_response,json=fileDescriptorResponse,proto3,oneof"`
+}
+
+type ServerReflectionResponse_AllExtensionNumbersResponse struct {
+	AllExtensionNumbersResponse *ExtensionNumberResponse `protobuf:"bytes,5,opt,name=all_extension_numbers_response,json=allExtensionNumbersResponse,proto3,oneof"`
+}
+
+type ServerReflectionResponse_ListServicesResponse struct {
+	ListServicesResponse *ListServiceResponse `protobuf:"bytes,6,opt,name=list_services_response,json=listServicesResponse,proto3,oneof"`
+}
+
+type ServerReflectionResponse_ErrorResponse struct {
+	ErrorResponse *ErrorResponse `protobuf:"bytes,7,opt,name=error_response,json=errorResponse,proto3,oneof"`
+}
+
+func (*ServerReflectionResponse_FileDescriptorResponse) isServerReflectionResponse_MessageResponse() {}
+
+func (*ServerReflectionResponse_AllExtensionNumbersResponse) isServerReflectionResponse_MessageResponse() {
+}
+
+func (*ServerReflectionResponse_ListServicesResponse) isServerReflectionResponse_MessageResponse() {}
+
+func (*ServerReflectionResponse_ErrorResponse) isServerReflectionResponse_MessageResponse() {}
+
+func (m *ServerReflectionResponse) GetMessageResponse() isServerReflectionResponse_MessageResponse {
+	if m != nil {
+		return m.MessageResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetFileDescriptorResponse() *FileDescriptorResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_FileDescriptorResponse); ok {
+		return x.FileDescriptorResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetAllExtensionNumbersResponse() *ExtensionNumberResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_AllExtensionNumbersResponse); ok {
+		return x.AllExtensionNumbersResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetListServicesResponse() *ListServiceResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_ListServicesResponse); ok {
+		return x.ListServicesResponse
+	}
+	return nil
+}
+
+func (m *ServerReflectionResponse) GetErrorResponse() *ErrorResponse {
+	if x, ok := m.GetMessageResponse().(*ServerReflectionResponse_ErrorResponse); ok {
+		return x.ErrorResponse
+	}
+	return nil
+}
+
+// XXX_OneofFuncs is for the internal use of the proto package.
+func (*ServerReflectionResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
+	return _ServerReflectionResponse_OneofMarshaler, _ServerReflectionResponse_OneofUnmarshaler, _ServerReflectionResponse_OneofSizer, []interface{}{
+		(*ServerReflectionResponse_FileDescriptorResponse)(nil),
+		(*ServerReflectionResponse_AllExtensionNumbersResponse)(nil),
+		(*ServerReflectionResponse_ListServicesResponse)(nil),
+		(*ServerReflectionResponse_ErrorResponse)(nil),
+	}
+}
+
+func _ServerReflectionResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
+	m := msg.(*ServerReflectionResponse)
+	// message_response
+	switch x := m.MessageResponse.(type) {
+	case *ServerReflectionResponse_FileDescriptorResponse:
+		b.EncodeVarint(4<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.FileDescriptorResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_AllExtensionNumbersResponse:
+		b.EncodeVarint(5<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.AllExtensionNumbersResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_ListServicesResponse:
+		b.EncodeVarint(6<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ListServicesResponse); err != nil {
+			return err
+		}
+	case *ServerReflectionResponse_ErrorResponse:
+		b.EncodeVarint(7<<3 | proto.WireBytes)
+		if err := b.EncodeMessage(x.ErrorResponse); err != nil {
+			return err
+		}
+	case nil:
+	default:
+		return fmt.Errorf("ServerReflectionResponse.MessageResponse has unexpected type %T", x)
+	}
+	return nil
+}
+
+func _ServerReflectionResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
+	m := msg.(*ServerReflectionResponse)
+	switch tag {
+	case 4: // message_response.file_descriptor_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(FileDescriptorResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_FileDescriptorResponse{msg}
+		return true, err
+	case 5: // message_response.all_extension_numbers_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ExtensionNumberResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_AllExtensionNumbersResponse{msg}
+		return true, err
+	case 6: // message_response.list_services_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ListServiceResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_ListServicesResponse{msg}
+		return true, err
+	case 7: // message_response.error_response
+		if wire != proto.WireBytes {
+			return true, proto.ErrInternalBadWireType
+		}
+		msg := new(ErrorResponse)
+		err := b.DecodeMessage(msg)
+		m.MessageResponse = &ServerReflectionResponse_ErrorResponse{msg}
+		return true, err
+	default:
+		return false, nil
+	}
+}
+
+func _ServerReflectionResponse_OneofSizer(msg proto.Message) (n int) {
+	m := msg.(*ServerReflectionResponse)
+	// message_response
+	switch x := m.MessageResponse.(type) {
+	case *ServerReflectionResponse_FileDescriptorResponse:
+		s := proto.Size(x.FileDescriptorResponse)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_AllExtensionNumbersResponse:
+		s := proto.Size(x.AllExtensionNumbersResponse)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_ListServicesResponse:
+		s := proto.Size(x.ListServicesResponse)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case *ServerReflectionResponse_ErrorResponse:
+		s := proto.Size(x.ErrorResponse)
+		n += 1 // tag and wire
+		n += proto.SizeVarint(uint64(s))
+		n += s
+	case nil:
+	default:
+		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
+	}
+	return n
+}
+
+// Serialized FileDescriptorProto messages sent by the server answering
+// a file_by_filename, file_containing_symbol, or file_containing_extension
+// request.
+type FileDescriptorResponse struct {
+	// Serialized FileDescriptorProto messages. We avoid taking a dependency on
+	// descriptor.proto, which uses proto2 only features, by making them opaque
+	// bytes instead.
+	FileDescriptorProto  [][]byte `protobuf:"bytes,1,rep,name=file_descriptor_proto,json=fileDescriptorProto,proto3" json:"file_descriptor_proto,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *FileDescriptorResponse) Reset()         { *m = FileDescriptorResponse{} }
+func (m *FileDescriptorResponse) String() string { return proto.CompactTextString(m) }
+func (*FileDescriptorResponse) ProtoMessage()    {}
+func (*FileDescriptorResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{3}
+}
+func (m *FileDescriptorResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_FileDescriptorResponse.Unmarshal(m, b)
+}
+func (m *FileDescriptorResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_FileDescriptorResponse.Marshal(b, m, deterministic)
+}
+func (dst *FileDescriptorResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileDescriptorResponse.Merge(dst, src)
+}
+func (m *FileDescriptorResponse) XXX_Size() int {
+	return xxx_messageInfo_FileDescriptorResponse.Size(m)
+}
+func (m *FileDescriptorResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileDescriptorResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileDescriptorResponse proto.InternalMessageInfo
+
+func (m *FileDescriptorResponse) GetFileDescriptorProto() [][]byte {
+	if m != nil {
+		return m.FileDescriptorProto
+	}
+	return nil
+}
+
+// A list of extension numbers sent by the server answering
+// all_extension_numbers_of_type request.
+type ExtensionNumberResponse struct {
+	// Full name of the base type, including the package name. The format
+	// is <package>.<type>
+	BaseTypeName         string   `protobuf:"bytes,1,opt,name=base_type_name,json=baseTypeName,proto3" json:"base_type_name,omitempty"`
+	ExtensionNumber      []int32  `protobuf:"varint,2,rep,packed,name=extension_number,json=extensionNumber,proto3" json:"extension_number,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ExtensionNumberResponse) Reset()         { *m = ExtensionNumberResponse{} }
+func (m *ExtensionNumberResponse) String() string { return proto.CompactTextString(m) }
+func (*ExtensionNumberResponse) ProtoMessage()    {}
+func (*ExtensionNumberResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{4}
+}
+func (m *ExtensionNumberResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ExtensionNumberResponse.Unmarshal(m, b)
+}
+func (m *ExtensionNumberResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ExtensionNumberResponse.Marshal(b, m, deterministic)
+}
+func (dst *ExtensionNumberResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ExtensionNumberResponse.Merge(dst, src)
+}
+func (m *ExtensionNumberResponse) XXX_Size() int {
+	return xxx_messageInfo_ExtensionNumberResponse.Size(m)
+}
+func (m *ExtensionNumberResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ExtensionNumberResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ExtensionNumberResponse proto.InternalMessageInfo
+
+func (m *ExtensionNumberResponse) GetBaseTypeName() string {
+	if m != nil {
+		return m.BaseTypeName
+	}
+	return ""
+}
+
+func (m *ExtensionNumberResponse) GetExtensionNumber() []int32 {
+	if m != nil {
+		return m.ExtensionNumber
+	}
+	return nil
+}
+
+// A list of ServiceResponse sent by the server answering list_services request.
+type ListServiceResponse struct {
+	// The information of each service may be expanded in the future, so we use
+	// ServiceResponse message to encapsulate it.
+	Service              []*ServiceResponse `protobuf:"bytes,1,rep,name=service,proto3" json:"service,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}           `json:"-"`
+	XXX_unrecognized     []byte             `json:"-"`
+	XXX_sizecache        int32              `json:"-"`
+}
+
+func (m *ListServiceResponse) Reset()         { *m = ListServiceResponse{} }
+func (m *ListServiceResponse) String() string { return proto.CompactTextString(m) }
+func (*ListServiceResponse) ProtoMessage()    {}
+func (*ListServiceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{5}
+}
+func (m *ListServiceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListServiceResponse.Unmarshal(m, b)
+}
+func (m *ListServiceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListServiceResponse.Marshal(b, m, deterministic)
+}
+func (dst *ListServiceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListServiceResponse.Merge(dst, src)
+}
+func (m *ListServiceResponse) XXX_Size() int {
+	return xxx_messageInfo_ListServiceResponse.Size(m)
+}
+func (m *ListServiceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListServiceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListServiceResponse proto.InternalMessageInfo
+
+func (m *ListServiceResponse) GetService() []*ServiceResponse {
+	if m != nil {
+		return m.Service
+	}
+	return nil
+}
+
+// The information of a single service used by ListServiceResponse to answer
+// list_services request.
+type ServiceResponse struct {
+	// Full name of a registered service, including its package name. The format
+	// is <package>.<service>
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ServiceResponse) Reset()         { *m = ServiceResponse{} }
+func (m *ServiceResponse) String() string { return proto.CompactTextString(m) }
+func (*ServiceResponse) ProtoMessage()    {}
+func (*ServiceResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{6}
+}
+func (m *ServiceResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ServiceResponse.Unmarshal(m, b)
+}
+func (m *ServiceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ServiceResponse.Marshal(b, m, deterministic)
+}
+func (dst *ServiceResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ServiceResponse.Merge(dst, src)
+}
+func (m *ServiceResponse) XXX_Size() int {
+	return xxx_messageInfo_ServiceResponse.Size(m)
+}
+func (m *ServiceResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ServiceResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ServiceResponse proto.InternalMessageInfo
+
+func (m *ServiceResponse) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+// The error code and error message sent by the server when an error occurs.
+type ErrorResponse struct {
+	// This field uses the error codes defined in grpc::StatusCode.
+	ErrorCode            int32    `protobuf:"varint,1,opt,name=error_code,json=errorCode,proto3" json:"error_code,omitempty"`
+	ErrorMessage         string   `protobuf:"bytes,2,opt,name=error_message,json=errorMessage,proto3" json:"error_message,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ErrorResponse) Reset()         { *m = ErrorResponse{} }
+func (m *ErrorResponse) String() string { return proto.CompactTextString(m) }
+func (*ErrorResponse) ProtoMessage()    {}
+func (*ErrorResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_reflection_178bd1e101bf8b63, []int{7}
+}
+func (m *ErrorResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ErrorResponse.Unmarshal(m, b)
+}
+func (m *ErrorResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ErrorResponse.Marshal(b, m, deterministic)
+}
+func (dst *ErrorResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ErrorResponse.Merge(dst, src)
+}
+func (m *ErrorResponse) XXX_Size() int {
+	return xxx_messageInfo_ErrorResponse.Size(m)
+}
+func (m *ErrorResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ErrorResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ErrorResponse proto.InternalMessageInfo
+
+func (m *ErrorResponse) GetErrorCode() int32 {
+	if m != nil {
+		return m.ErrorCode
+	}
+	return 0
+}
+
+func (m *ErrorResponse) GetErrorMessage() string {
+	if m != nil {
+		return m.ErrorMessage
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*ServerReflectionRequest)(nil), "grpc.reflection.v1alpha.ServerReflectionRequest")
+	proto.RegisterType((*ExtensionRequest)(nil), "grpc.reflection.v1alpha.ExtensionRequest")
+	proto.RegisterType((*ServerReflectionResponse)(nil), "grpc.reflection.v1alpha.ServerReflectionResponse")
+	proto.RegisterType((*FileDescriptorResponse)(nil), "grpc.reflection.v1alpha.FileDescriptorResponse")
+	proto.RegisterType((*ExtensionNumberResponse)(nil), "grpc.reflection.v1alpha.ExtensionNumberResponse")
+	proto.RegisterType((*ListServiceResponse)(nil), "grpc.reflection.v1alpha.ListServiceResponse")
+	proto.RegisterType((*ServiceResponse)(nil), "grpc.reflection.v1alpha.ServiceResponse")
+	proto.RegisterType((*ErrorResponse)(nil), "grpc.reflection.v1alpha.ErrorResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// ServerReflectionClient is the client API for ServerReflection service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ServerReflectionClient interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error)
+}
+
+type serverReflectionClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewServerReflectionClient(cc *grpc.ClientConn) ServerReflectionClient {
+	return &serverReflectionClient{cc}
+}
+
+func (c *serverReflectionClient) ServerReflectionInfo(ctx context.Context, opts ...grpc.CallOption) (ServerReflection_ServerReflectionInfoClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_ServerReflection_serviceDesc.Streams[0], "/grpc.reflection.v1alpha.ServerReflection/ServerReflectionInfo", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &serverReflectionServerReflectionInfoClient{stream}
+	return x, nil
+}
+
+type ServerReflection_ServerReflectionInfoClient interface {
+	Send(*ServerReflectionRequest) error
+	Recv() (*ServerReflectionResponse, error)
+	grpc.ClientStream
+}
+
+type serverReflectionServerReflectionInfoClient struct {
+	grpc.ClientStream
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Send(m *ServerReflectionRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoClient) Recv() (*ServerReflectionResponse, error) {
+	m := new(ServerReflectionResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// ServerReflectionServer is the server API for ServerReflection service.
+type ServerReflectionServer interface {
+	// The reflection service is structured as a bidirectional stream, ensuring
+	// all related requests go to a single server.
+	ServerReflectionInfo(ServerReflection_ServerReflectionInfoServer) error
+}
+
+func RegisterServerReflectionServer(s *grpc.Server, srv ServerReflectionServer) {
+	s.RegisterService(&_ServerReflection_serviceDesc, srv)
+}
+
+func _ServerReflection_ServerReflectionInfo_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(ServerReflectionServer).ServerReflectionInfo(&serverReflectionServerReflectionInfoServer{stream})
+}
+
+type ServerReflection_ServerReflectionInfoServer interface {
+	Send(*ServerReflectionResponse) error
+	Recv() (*ServerReflectionRequest, error)
+	grpc.ServerStream
+}
+
+type serverReflectionServerReflectionInfoServer struct {
+	grpc.ServerStream
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Send(m *ServerReflectionResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *serverReflectionServerReflectionInfoServer) Recv() (*ServerReflectionRequest, error) {
+	m := new(ServerReflectionRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _ServerReflection_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "grpc.reflection.v1alpha.ServerReflection",
+	HandlerType: (*ServerReflectionServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "ServerReflectionInfo",
+			Handler:       _ServerReflection_ServerReflectionInfo_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "grpc_reflection_v1alpha/reflection.proto",
+}
+
+func init() {
+	proto.RegisterFile("grpc_reflection_v1alpha/reflection.proto", fileDescriptor_reflection_178bd1e101bf8b63)
+}
+
+var fileDescriptor_reflection_178bd1e101bf8b63 = []byte{
+	// 656 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x54, 0x51, 0x73, 0xd2, 0x40,
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+	0x1c, 0xda, 0xe2, 0x8c, 0x3f, 0x80, 0xaa, 0x83, 0x33, 0xb5, 0x75, 0x0e, 0x5f, 0x1c, 0x1f, 0x6e,
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+	0x01, 0x7b, 0x22, 0x82, 0x21, 0x13, 0x38, 0xf6, 0x70, 0x18, 0xba, 0xdc, 0x67, 0xb3, 0x33, 0xc7,
+	0x0b, 0xae, 0x9d, 0x93, 0x25, 0xd4, 0x0e, 0x04, 0x0f, 0x39, 0x69, 0xaa, 0xcc, 0x76, 0x0a, 0x8e,
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+	0x21, 0x21, 0x50, 0xb8, 0xe6, 0x32, 0x34, 0x8d, 0x96, 0x61, 0x97, 0xa8, 0xfe, 0x4f, 0x9e, 0x43,
+	0x7d, 0xec, 0x7a, 0xc8, 0x06, 0x73, 0xa6, 0x7e, 0x7d, 0x67, 0x8a, 0xe6, 0x96, 0x8a, 0xf7, 0x36,
+	0x68, 0x55, 0x21, 0xdd, 0xf9, 0xdb, 0x18, 0x27, 0xaf, 0xa0, 0xa1, 0x73, 0x87, 0xdc, 0x0f, 0x1d,
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+	0xa4, 0xec, 0x32, 0x4a, 0xba, 0x1a, 0x7f, 0x9c, 0x07, 0x48, 0x8e, 0x60, 0xd7, 0x73, 0x65, 0xc8,
+	0x24, 0x8a, 0x99, 0x3b, 0x44, 0x69, 0xee, 0xc4, 0x35, 0x15, 0x05, 0xf7, 0x63, 0xb4, 0x7b, 0x0f,
+	0x6a, 0x53, 0x94, 0xd2, 0x99, 0x20, 0x13, 0x51, 0x63, 0xd6, 0x18, 0xea, 0xd9, 0x66, 0xc9, 0x33,
+	0xa8, 0xa5, 0xa6, 0xd6, 0x3d, 0x44, 0xdb, 0xaf, 0x2e, 0x61, 0x4d, 0x7b, 0x0c, 0xf5, 0x6c, 0xdb,
+	0xe6, 0x66, 0xcb, 0xb0, 0x8b, 0xb4, 0x86, 0xab, 0x8d, 0x5a, 0xbf, 0x0b, 0x60, 0xde, 0x96, 0x58,
+	0x06, 0xdc, 0x97, 0x48, 0x0e, 0x01, 0x66, 0x8e, 0xe7, 0x8e, 0x58, 0x4a, 0xe9, 0x92, 0x46, 0x7a,
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+	0x84, 0x75, 0x7e, 0x19, 0x50, 0xcf, 0x9e, 0x1b, 0xf9, 0x09, 0xfb, 0x59, 0xec, 0x9d, 0x3f, 0xe6,
+	0xe4, 0xce, 0x17, 0xfb, 0xe0, 0xec, 0x0e, 0x15, 0xd1, 0x54, 0xb6, 0x71, 0x6a, 0x0c, 0xb6, 0xb5,
+	0xf4, 0x2f, 0xff, 0x06, 0x00, 0x00, 0xff, 0xff, 0x85, 0x02, 0x09, 0x9d, 0x9f, 0x06, 0x00, 0x00,
+}
diff --git a/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto
new file mode 100644
index 0000000..99b00df
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/grpc_reflection_v1alpha/reflection.proto
@@ -0,0 +1,136 @@
+// Copyright 2016 gRPC authors.
+//
+// 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.
+
+// Service exported by server reflection
+
+syntax = "proto3";
+
+package grpc.reflection.v1alpha;
+
+service ServerReflection {
+  // The reflection service is structured as a bidirectional stream, ensuring
+  // all related requests go to a single server.
+  rpc ServerReflectionInfo(stream ServerReflectionRequest)
+      returns (stream ServerReflectionResponse);
+}
+
+// The message sent by the client when calling ServerReflectionInfo method.
+message ServerReflectionRequest {
+  string host = 1;
+  // To use reflection service, the client should set one of the following
+  // fields in message_request. The server distinguishes requests by their
+  // defined field and then handles them using corresponding methods.
+  oneof message_request {
+    // Find a proto file by the file name.
+    string file_by_filename = 3;
+
+    // Find the proto file that declares the given fully-qualified symbol name.
+    // This field should be a fully-qualified symbol name
+    // (e.g. <package>.<service>[.<method>] or <package>.<type>).
+    string file_containing_symbol = 4;
+
+    // Find the proto file which defines an extension extending the given
+    // message type with the given field number.
+    ExtensionRequest file_containing_extension = 5;
+
+    // Finds the tag numbers used by all known extensions of extendee_type, and
+    // appends them to ExtensionNumberResponse in an undefined order.
+    // Its corresponding method is best-effort: it's not guaranteed that the
+    // reflection service will implement this method, and it's not guaranteed
+    // that this method will provide all extensions. Returns
+    // StatusCode::UNIMPLEMENTED if it's not implemented.
+    // This field should be a fully-qualified type name. The format is
+    // <package>.<type>
+    string all_extension_numbers_of_type = 6;
+
+    // List the full names of registered services. The content will not be
+    // checked.
+    string list_services = 7;
+  }
+}
+
+// The type name and extension number sent by the client when requesting
+// file_containing_extension.
+message ExtensionRequest {
+  // Fully-qualified type name. The format should be <package>.<type>
+  string containing_type = 1;
+  int32 extension_number = 2;
+}
+
+// The message sent by the server to answer ServerReflectionInfo method.
+message ServerReflectionResponse {
+  string valid_host = 1;
+  ServerReflectionRequest original_request = 2;
+  // The server sets one of the following fields according to the
+  // message_request in the request.
+  oneof message_response {
+    // This message is used to answer file_by_filename, file_containing_symbol,
+    // file_containing_extension requests with transitive dependencies.
+    // As the repeated label is not allowed in oneof fields, we use a
+    // FileDescriptorResponse message to encapsulate the repeated fields.
+    // The reflection service is allowed to avoid sending FileDescriptorProtos
+    // that were previously sent in response to earlier requests in the stream.
+    FileDescriptorResponse file_descriptor_response = 4;
+
+    // This message is used to answer all_extension_numbers_of_type requests.
+    ExtensionNumberResponse all_extension_numbers_response = 5;
+
+    // This message is used to answer list_services requests.
+    ListServiceResponse list_services_response = 6;
+
+    // This message is used when an error occurs.
+    ErrorResponse error_response = 7;
+  }
+}
+
+// Serialized FileDescriptorProto messages sent by the server answering
+// a file_by_filename, file_containing_symbol, or file_containing_extension
+// request.
+message FileDescriptorResponse {
+  // Serialized FileDescriptorProto messages. We avoid taking a dependency on
+  // descriptor.proto, which uses proto2 only features, by making them opaque
+  // bytes instead.
+  repeated bytes file_descriptor_proto = 1;
+}
+
+// A list of extension numbers sent by the server answering
+// all_extension_numbers_of_type request.
+message ExtensionNumberResponse {
+  // Full name of the base type, including the package name. The format
+  // is <package>.<type>
+  string base_type_name = 1;
+  repeated int32 extension_number = 2;
+}
+
+// A list of ServiceResponse sent by the server answering list_services request.
+message ListServiceResponse {
+  // The information of each service may be expanded in the future, so we use
+  // ServiceResponse message to encapsulate it.
+  repeated ServiceResponse service = 1;
+}
+
+// The information of a single service used by ListServiceResponse to answer
+// list_services request.
+message ServiceResponse {
+  // Full name of a registered service, including its package name. The format
+  // is <package>.<service>
+  string name = 1;
+}
+
+// The error code and error message sent by the server when an error occurs.
+message ErrorResponse {
+  // This field uses the error codes defined in grpc::StatusCode.
+  int32 error_code = 1;
+  string error_message = 2;
+}
diff --git a/vendor/google.golang.org/grpc/reflection/serverreflection.go b/vendor/google.golang.org/grpc/reflection/serverreflection.go
new file mode 100644
index 0000000..dd22a2d
--- /dev/null
+++ b/vendor/google.golang.org/grpc/reflection/serverreflection.go
@@ -0,0 +1,454 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * 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.
+ *
+ */
+
+//go:generate protoc --go_out=plugins=grpc:. grpc_reflection_v1alpha/reflection.proto
+
+/*
+Package reflection implements server reflection service.
+
+The service implemented is defined in:
+https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+	import "google.golang.org/grpc/reflection"
+
+	s := grpc.NewServer()
+	pb.RegisterYourOwnServer(s, &server{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+
+	s.Serve(lis)
+
+*/
+package reflection // import "google.golang.org/grpc/reflection"
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"reflect"
+	"sort"
+	"sync"
+
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
+	"google.golang.org/grpc/status"
+)
+
+type serverReflectionServer struct {
+	s *grpc.Server
+
+	initSymbols  sync.Once
+	serviceNames []string
+	symbols      map[string]*dpb.FileDescriptorProto // map of fully-qualified names to files
+}
+
+// Register registers the server reflection service on the given gRPC server.
+func Register(s *grpc.Server) {
+	rpb.RegisterServerReflectionServer(s, &serverReflectionServer{
+		s: s,
+	})
+}
+
+// protoMessage is used for type assertion on proto messages.
+// Generated proto message implements function Descriptor(), but Descriptor()
+// is not part of interface proto.Message. This interface is needed to
+// call Descriptor().
+type protoMessage interface {
+	Descriptor() ([]byte, []int)
+}
+
+func (s *serverReflectionServer) getSymbols() (svcNames []string, symbolIndex map[string]*dpb.FileDescriptorProto) {
+	s.initSymbols.Do(func() {
+		serviceInfo := s.s.GetServiceInfo()
+
+		s.symbols = map[string]*dpb.FileDescriptorProto{}
+		s.serviceNames = make([]string, 0, len(serviceInfo))
+		processed := map[string]struct{}{}
+		for svc, info := range serviceInfo {
+			s.serviceNames = append(s.serviceNames, svc)
+			fdenc, ok := parseMetadata(info.Metadata)
+			if !ok {
+				continue
+			}
+			fd, err := decodeFileDesc(fdenc)
+			if err != nil {
+				continue
+			}
+			s.processFile(fd, processed)
+		}
+		sort.Strings(s.serviceNames)
+	})
+
+	return s.serviceNames, s.symbols
+}
+
+func (s *serverReflectionServer) processFile(fd *dpb.FileDescriptorProto, processed map[string]struct{}) {
+	filename := fd.GetName()
+	if _, ok := processed[filename]; ok {
+		return
+	}
+	processed[filename] = struct{}{}
+
+	prefix := fd.GetPackage()
+
+	for _, msg := range fd.MessageType {
+		s.processMessage(fd, prefix, msg)
+	}
+	for _, en := range fd.EnumType {
+		s.processEnum(fd, prefix, en)
+	}
+	for _, ext := range fd.Extension {
+		s.processField(fd, prefix, ext)
+	}
+	for _, svc := range fd.Service {
+		svcName := fqn(prefix, svc.GetName())
+		s.symbols[svcName] = fd
+		for _, meth := range svc.Method {
+			name := fqn(svcName, meth.GetName())
+			s.symbols[name] = fd
+		}
+	}
+
+	for _, dep := range fd.Dependency {
+		fdenc := proto.FileDescriptor(dep)
+		fdDep, err := decodeFileDesc(fdenc)
+		if err != nil {
+			continue
+		}
+		s.processFile(fdDep, processed)
+	}
+}
+
+func (s *serverReflectionServer) processMessage(fd *dpb.FileDescriptorProto, prefix string, msg *dpb.DescriptorProto) {
+	msgName := fqn(prefix, msg.GetName())
+	s.symbols[msgName] = fd
+
+	for _, nested := range msg.NestedType {
+		s.processMessage(fd, msgName, nested)
+	}
+	for _, en := range msg.EnumType {
+		s.processEnum(fd, msgName, en)
+	}
+	for _, ext := range msg.Extension {
+		s.processField(fd, msgName, ext)
+	}
+	for _, fld := range msg.Field {
+		s.processField(fd, msgName, fld)
+	}
+	for _, oneof := range msg.OneofDecl {
+		oneofName := fqn(msgName, oneof.GetName())
+		s.symbols[oneofName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processEnum(fd *dpb.FileDescriptorProto, prefix string, en *dpb.EnumDescriptorProto) {
+	enName := fqn(prefix, en.GetName())
+	s.symbols[enName] = fd
+
+	for _, val := range en.Value {
+		valName := fqn(enName, val.GetName())
+		s.symbols[valName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processField(fd *dpb.FileDescriptorProto, prefix string, fld *dpb.FieldDescriptorProto) {
+	fldName := fqn(prefix, fld.GetName())
+	s.symbols[fldName] = fd
+}
+
+func fqn(prefix, name string) string {
+	if prefix == "" {
+		return name
+	}
+	return prefix + "." + name
+}
+
+// fileDescForType gets the file descriptor for the given type.
+// The given type should be a proto message.
+func (s *serverReflectionServer) fileDescForType(st reflect.Type) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(protoMessage)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+	enc, _ := m.Descriptor()
+
+	return decodeFileDesc(enc)
+}
+
+// decodeFileDesc does decompression and unmarshalling on the given
+// file descriptor byte slice.
+func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
+	raw, err := decompress(enc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decompress enc: %v", err)
+	}
+
+	fd := new(dpb.FileDescriptorProto)
+	if err := proto.Unmarshal(raw, fd); err != nil {
+		return nil, fmt.Errorf("bad descriptor: %v", err)
+	}
+	return fd, nil
+}
+
+// decompress does gzip decompression.
+func decompress(b []byte) ([]byte, error) {
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	out, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	return out, nil
+}
+
+func typeForName(name string) (reflect.Type, error) {
+	pt := proto.MessageType(name)
+	if pt == nil {
+		return nil, fmt.Errorf("unknown type: %q", name)
+	}
+	st := pt.Elem()
+
+	return st, nil
+}
+
+func fileDescContainingExtension(st reflect.Type, ext int32) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	var extDesc *proto.ExtensionDesc
+	for id, desc := range proto.RegisteredExtensions(m) {
+		if id == ext {
+			extDesc = desc
+			break
+		}
+	}
+
+	if extDesc == nil {
+		return nil, fmt.Errorf("failed to find registered extension for extension number %v", ext)
+	}
+
+	return decodeFileDesc(proto.FileDescriptor(extDesc.Filename))
+}
+
+func (s *serverReflectionServer) allExtensionNumbersForType(st reflect.Type) ([]int32, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	exts := proto.RegisteredExtensions(m)
+	out := make([]int32, 0, len(exts))
+	for id := range exts {
+		out = append(out, id)
+	}
+	return out, nil
+}
+
+// fileDescEncodingByFilename finds the file descriptor for given filename,
+// does marshalling on it and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingByFilename(name string) ([]byte, error) {
+	enc := proto.FileDescriptor(name)
+	if enc == nil {
+		return nil, fmt.Errorf("unknown file: %v", name)
+	}
+	fd, err := decodeFileDesc(enc)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(fd)
+}
+
+// parseMetadata finds the file descriptor bytes specified meta.
+// For SupportPackageIsVersion4, m is the name of the proto file, we
+// call proto.FileDescriptor to get the byte slice.
+// For SupportPackageIsVersion3, m is a byte slice itself.
+func parseMetadata(meta interface{}) ([]byte, bool) {
+	// Check if meta is the file name.
+	if fileNameForMeta, ok := meta.(string); ok {
+		return proto.FileDescriptor(fileNameForMeta), true
+	}
+
+	// Check if meta is the byte slice.
+	if enc, ok := meta.([]byte); ok {
+		return enc, true
+	}
+
+	return nil, false
+}
+
+// fileDescEncodingContainingSymbol finds the file descriptor containing the given symbol,
+// does marshalling on it and returns the marshalled result.
+// The given symbol can be a type, a service or a method.
+func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string) ([]byte, error) {
+	_, symbols := s.getSymbols()
+	fd := symbols[name]
+	if fd == nil {
+		// Check if it's a type name that was not present in the
+		// transitive dependencies of the registered services.
+		if st, err := typeForName(name); err == nil {
+			fd, err = s.fileDescForType(st)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	if fd == nil {
+		return nil, fmt.Errorf("unknown symbol: %v", name)
+	}
+
+	return proto.Marshal(fd)
+}
+
+// fileDescEncodingContainingExtension finds the file descriptor containing given extension,
+// does marshalling on it and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingContainingExtension(typeName string, extNum int32) ([]byte, error) {
+	st, err := typeForName(typeName)
+	if err != nil {
+		return nil, err
+	}
+	fd, err := fileDescContainingExtension(st, extNum)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(fd)
+}
+
+// allExtensionNumbersForTypeName returns all extension numbers for the given type.
+func (s *serverReflectionServer) allExtensionNumbersForTypeName(name string) ([]int32, error) {
+	st, err := typeForName(name)
+	if err != nil {
+		return nil, err
+	}
+	extNums, err := s.allExtensionNumbersForType(st)
+	if err != nil {
+		return nil, err
+	}
+	return extNums, nil
+}
+
+// ServerReflectionInfo is the reflection service handler.
+func (s *serverReflectionServer) ServerReflectionInfo(stream rpb.ServerReflection_ServerReflectionInfoServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		out := &rpb.ServerReflectionResponse{
+			ValidHost:       in.Host,
+			OriginalRequest: in,
+		}
+		switch req := in.MessageRequest.(type) {
+		case *rpb.ServerReflectionRequest_FileByFilename:
+			b, err := s.fileDescEncodingByFilename(req.FileByFilename)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingSymbol:
+			b, err := s.fileDescEncodingContainingSymbol(req.FileContainingSymbol)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingExtension:
+			typeName := req.FileContainingExtension.ContainingType
+			extNum := req.FileContainingExtension.ExtensionNumber
+			b, err := s.fileDescEncodingContainingExtension(typeName, extNum)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: [][]byte{b}},
+				}
+			}
+		case *rpb.ServerReflectionRequest_AllExtensionNumbersOfType:
+			extNums, err := s.allExtensionNumbersForTypeName(req.AllExtensionNumbersOfType)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_AllExtensionNumbersResponse{
+					AllExtensionNumbersResponse: &rpb.ExtensionNumberResponse{
+						BaseTypeName:    req.AllExtensionNumbersOfType,
+						ExtensionNumber: extNums,
+					},
+				}
+			}
+		case *rpb.ServerReflectionRequest_ListServices:
+			svcNames, _ := s.getSymbols()
+			serviceResponses := make([]*rpb.ServiceResponse, len(svcNames))
+			for i, n := range svcNames {
+				serviceResponses[i] = &rpb.ServiceResponse{
+					Name: n,
+				}
+			}
+			out.MessageResponse = &rpb.ServerReflectionResponse_ListServicesResponse{
+				ListServicesResponse: &rpb.ListServiceResponse{
+					Service: serviceResponses,
+				},
+			}
+		default:
+			return status.Errorf(codes.InvalidArgument, "invalid MessageRequest: %v", in.MessageRequest)
+		}
+
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}