diff --git a/vendor/github.com/gogo/protobuf/gogoproto/gogo.pb.go b/vendor/github.com/gogo/protobuf/gogoproto/gogo.pb.go
index e352808..1e91766 100644
--- a/vendor/github.com/gogo/protobuf/gogoproto/gogo.pb.go
+++ b/vendor/github.com/gogo/protobuf/gogoproto/gogo.pb.go
@@ -19,7 +19,7 @@
 // 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.GoGoProtoPackageIsVersion2 // please upgrade the proto package
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
 var E_GoprotoEnumPrefix = &proto.ExtensionDesc{
 	ExtendedType:  (*descriptor.EnumOptions)(nil),
diff --git a/vendor/github.com/gogo/protobuf/proto/extensions.go b/vendor/github.com/gogo/protobuf/proto/extensions.go
index 686bd2a..341c6f5 100644
--- a/vendor/github.com/gogo/protobuf/proto/extensions.go
+++ b/vendor/github.com/gogo/protobuf/proto/extensions.go
@@ -527,6 +527,7 @@
 // SetExtension sets the specified extension of pb to the specified value.
 func SetExtension(pb Message, extension *ExtensionDesc, value interface{}) error {
 	if epb, ok := pb.(extensionsBytes); ok {
+		ClearExtension(pb, extension)
 		newb, err := encodeExtension(extension, value)
 		if err != nil {
 			return err
diff --git a/vendor/github.com/gogo/protobuf/proto/extensions_gogo.go b/vendor/github.com/gogo/protobuf/proto/extensions_gogo.go
index 53ebd8c..6f1ae12 100644
--- a/vendor/github.com/gogo/protobuf/proto/extensions_gogo.go
+++ b/vendor/github.com/gogo/protobuf/proto/extensions_gogo.go
@@ -154,6 +154,10 @@
 	return EncodeExtensionMap(m.extensionsWrite(), data)
 }
 
+func EncodeInternalExtensionBackwards(m extendableProto, data []byte) (n int, err error) {
+	return EncodeExtensionMapBackwards(m.extensionsWrite(), data)
+}
+
 func EncodeExtensionMap(m map[int32]Extension, data []byte) (n int, err error) {
 	o := 0
 	for _, e := range m {
@@ -169,6 +173,23 @@
 	return o, nil
 }
 
+func EncodeExtensionMapBackwards(m map[int32]Extension, data []byte) (n int, err error) {
+	o := 0
+	end := len(data)
+	for _, e := range m {
+		if err := e.Encode(); err != nil {
+			return 0, err
+		}
+		n := copy(data[end-len(e.enc):], e.enc)
+		if n != len(e.enc) {
+			return 0, io.ErrShortBuffer
+		}
+		end -= n
+		o += n
+	}
+	return o, nil
+}
+
 func GetRawExtension(m map[int32]Extension, id int32) ([]byte, error) {
 	e := m[id]
 	if err := e.Encode(); err != nil {
diff --git a/vendor/github.com/gogo/protobuf/proto/lib.go b/vendor/github.com/gogo/protobuf/proto/lib.go
index d17f802..80db1c1 100644
--- a/vendor/github.com/gogo/protobuf/proto/lib.go
+++ b/vendor/github.com/gogo/protobuf/proto/lib.go
@@ -948,13 +948,19 @@
 	return false
 }
 
-// ProtoPackageIsVersion2 is referenced from generated protocol buffer files
-// to assert that that code is compatible with this version of the proto package.
-const GoGoProtoPackageIsVersion2 = true
+const (
+	// ProtoPackageIsVersion3 is referenced from generated protocol buffer files
+	// to assert that that code is compatible with this version of the proto package.
+	GoGoProtoPackageIsVersion3 = true
 
-// ProtoPackageIsVersion1 is referenced from generated protocol buffer files
-// to assert that that code is compatible with this version of the proto package.
-const GoGoProtoPackageIsVersion1 = true
+	// ProtoPackageIsVersion2 is referenced from generated protocol buffer files
+	// to assert that that code is compatible with this version of the proto package.
+	GoGoProtoPackageIsVersion2 = true
+
+	// ProtoPackageIsVersion1 is referenced from generated protocol buffer files
+	// to assert that that code is compatible with this version of the proto package.
+	GoGoProtoPackageIsVersion1 = true
+)
 
 // InternalMessageInfo is a type used internally by generated .pb.go files.
 // This type is not intended to be used by non-generated code.
diff --git a/vendor/github.com/gogo/protobuf/proto/properties.go b/vendor/github.com/gogo/protobuf/proto/properties.go
index c9e5fa0..62c5562 100644
--- a/vendor/github.com/gogo/protobuf/proto/properties.go
+++ b/vendor/github.com/gogo/protobuf/proto/properties.go
@@ -400,6 +400,15 @@
 	return sprop
 }
 
+type (
+	oneofFuncsIface interface {
+		XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
+	}
+	oneofWrappersIface interface {
+		XXX_OneofWrappers() []interface{}
+	}
+)
+
 // getPropertiesLocked requires that propertiesMu is held.
 func getPropertiesLocked(t reflect.Type) *StructProperties {
 	if prop, ok := propertiesMap[t]; ok {
@@ -441,37 +450,40 @@
 	// Re-order prop.order.
 	sort.Sort(prop)
 
-	type oneofMessage interface {
-		XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
-	}
-	if om, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); isOneofMessage && ok {
+	if isOneofMessage {
 		var oots []interface{}
-		_, _, _, oots = om.XXX_OneofFuncs()
-
-		// Interpret oneof metadata.
-		prop.OneofTypes = make(map[string]*OneofProperties)
-		for _, oot := range oots {
-			oop := &OneofProperties{
-				Type: reflect.ValueOf(oot).Type(), // *T
-				Prop: new(Properties),
-			}
-			sft := oop.Type.Elem().Field(0)
-			oop.Prop.Name = sft.Name
-			oop.Prop.Parse(sft.Tag.Get("protobuf"))
-			// There will be exactly one interface field that
-			// this new value is assignable to.
-			for i := 0; i < t.NumField(); i++ {
-				f := t.Field(i)
-				if f.Type.Kind() != reflect.Interface {
-					continue
+		switch m := reflect.Zero(reflect.PtrTo(t)).Interface().(type) {
+		case oneofFuncsIface:
+			_, _, _, oots = m.XXX_OneofFuncs()
+		case oneofWrappersIface:
+			oots = m.XXX_OneofWrappers()
+		}
+		if len(oots) > 0 {
+			// Interpret oneof metadata.
+			prop.OneofTypes = make(map[string]*OneofProperties)
+			for _, oot := range oots {
+				oop := &OneofProperties{
+					Type: reflect.ValueOf(oot).Type(), // *T
+					Prop: new(Properties),
 				}
-				if !oop.Type.AssignableTo(f.Type) {
-					continue
+				sft := oop.Type.Elem().Field(0)
+				oop.Prop.Name = sft.Name
+				oop.Prop.Parse(sft.Tag.Get("protobuf"))
+				// There will be exactly one interface field that
+				// this new value is assignable to.
+				for i := 0; i < t.NumField(); i++ {
+					f := t.Field(i)
+					if f.Type.Kind() != reflect.Interface {
+						continue
+					}
+					if !oop.Type.AssignableTo(f.Type) {
+						continue
+					}
+					oop.Field = i
+					break
 				}
-				oop.Field = i
-				break
+				prop.OneofTypes[oop.Prop.OrigName] = oop
 			}
-			prop.OneofTypes[oop.Prop.OrigName] = oop
 		}
 	}
 
diff --git a/vendor/github.com/gogo/protobuf/proto/table_marshal.go b/vendor/github.com/gogo/protobuf/proto/table_marshal.go
index 9b1538d..db9927a 100644
--- a/vendor/github.com/gogo/protobuf/proto/table_marshal.go
+++ b/vendor/github.com/gogo/protobuf/proto/table_marshal.go
@@ -389,8 +389,13 @@
 	// get oneof implementers
 	var oneofImplementers []interface{}
 	// gogo: isOneofMessage is needed for embedded oneof messages, without a marshaler and unmarshaler
-	if m, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); ok && isOneofMessage {
-		_, _, _, oneofImplementers = m.XXX_OneofFuncs()
+	if isOneofMessage {
+		switch m := reflect.Zero(reflect.PtrTo(t)).Interface().(type) {
+		case oneofFuncsIface:
+			_, _, _, oneofImplementers = m.XXX_OneofFuncs()
+		case oneofWrappersIface:
+			oneofImplementers = m.XXX_OneofWrappers()
+		}
 	}
 
 	// normal fields
@@ -519,10 +524,6 @@
 	}
 }
 
-type oneofMessage interface {
-	XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
-}
-
 // wiretype returns the wire encoding of the type.
 func wiretype(encoding string) uint64 {
 	switch encoding {
diff --git a/vendor/github.com/gogo/protobuf/proto/table_merge.go b/vendor/github.com/gogo/protobuf/proto/table_merge.go
index f520106..60dcf70 100644
--- a/vendor/github.com/gogo/protobuf/proto/table_merge.go
+++ b/vendor/github.com/gogo/protobuf/proto/table_merge.go
@@ -530,6 +530,25 @@
 			}
 		case reflect.Struct:
 			switch {
+			case isSlice && !isPointer: // E.g. []pb.T
+				mergeInfo := getMergeInfo(tf)
+				zero := reflect.Zero(tf)
+				mfi.merge = func(dst, src pointer) {
+					// TODO: Make this faster?
+					dstsp := dst.asPointerTo(f.Type)
+					dsts := dstsp.Elem()
+					srcs := src.asPointerTo(f.Type).Elem()
+					for i := 0; i < srcs.Len(); i++ {
+						dsts = reflect.Append(dsts, zero)
+						srcElement := srcs.Index(i).Addr()
+						dstElement := dsts.Index(dsts.Len() - 1).Addr()
+						mergeInfo.merge(valToPointer(dstElement), valToPointer(srcElement))
+					}
+					if dsts.IsNil() {
+						dsts = reflect.MakeSlice(f.Type, 0, 0)
+					}
+					dstsp.Elem().Set(dsts)
+				}
 			case !isPointer:
 				mergeInfo := getMergeInfo(tf)
 				mfi.merge = func(dst, src pointer) {
diff --git a/vendor/github.com/gogo/protobuf/proto/table_unmarshal.go b/vendor/github.com/gogo/protobuf/proto/table_unmarshal.go
index bb2622f..9372293 100644
--- a/vendor/github.com/gogo/protobuf/proto/table_unmarshal.go
+++ b/vendor/github.com/gogo/protobuf/proto/table_unmarshal.go
@@ -371,15 +371,18 @@
 	}
 
 	// Find any types associated with oneof fields.
-	// TODO: XXX_OneofFuncs returns more info than we need.  Get rid of some of it?
-	fn := reflect.Zero(reflect.PtrTo(t)).MethodByName("XXX_OneofFuncs")
 	// gogo: len(oneofFields) > 0 is needed for embedded oneof messages, without a marshaler and unmarshaler
-	if fn.IsValid() && len(oneofFields) > 0 {
-		res := fn.Call(nil)[3] // last return value from XXX_OneofFuncs: []interface{}
-		for i := res.Len() - 1; i >= 0; i-- {
-			v := res.Index(i)                             // interface{}
-			tptr := reflect.ValueOf(v.Interface()).Type() // *Msg_X
-			typ := tptr.Elem()                            // Msg_X
+	if len(oneofFields) > 0 {
+		var oneofImplementers []interface{}
+		switch m := reflect.Zero(reflect.PtrTo(t)).Interface().(type) {
+		case oneofFuncsIface:
+			_, _, _, oneofImplementers = m.XXX_OneofFuncs()
+		case oneofWrappersIface:
+			oneofImplementers = m.XXX_OneofWrappers()
+		}
+		for _, v := range oneofImplementers {
+			tptr := reflect.TypeOf(v) // *Msg_X
+			typ := tptr.Elem()        // Msg_X
 
 			f := typ.Field(0) // oneof implementers have one field
 			baseUnmarshal := fieldUnmarshaler(&f)
@@ -407,11 +410,12 @@
 					u.setTag(fieldNum, of.field, unmarshal, 0, name)
 				}
 			}
+
 		}
 	}
 
 	// Get extension ranges, if any.
-	fn = reflect.Zero(reflect.PtrTo(t)).MethodByName("ExtensionRangeArray")
+	fn := reflect.Zero(reflect.PtrTo(t)).MethodByName("ExtensionRangeArray")
 	if fn.IsValid() {
 		if !u.extensions.IsValid() && !u.oldExtensions.IsValid() && !u.bytesExtensions.IsValid() {
 			panic("a message with extensions, but no extensions field in " + t.Name())
diff --git a/vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go b/vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go
index cacfa39..d1307d9 100644
--- a/vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go
+++ b/vendor/github.com/gogo/protobuf/protoc-gen-gogo/descriptor/descriptor.pb.go
@@ -18,7 +18,7 @@
 // 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.GoGoProtoPackageIsVersion2 // please upgrade the proto package
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
 type FieldDescriptorProto_Type int32
 
diff --git a/vendor/github.com/gogo/protobuf/sortkeys/sortkeys.go b/vendor/github.com/gogo/protobuf/sortkeys/sortkeys.go
deleted file mode 100644
index ceadde6..0000000
--- a/vendor/github.com/gogo/protobuf/sortkeys/sortkeys.go
+++ /dev/null
@@ -1,101 +0,0 @@
-// Protocol Buffers for Go with Gadgets
-//
-// Copyright (c) 2013, The GoGo Authors. All rights reserved.
-// http://github.com/gogo/protobuf
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-package sortkeys
-
-import (
-	"sort"
-)
-
-func Strings(l []string) {
-	sort.Strings(l)
-}
-
-func Float64s(l []float64) {
-	sort.Float64s(l)
-}
-
-func Float32s(l []float32) {
-	sort.Sort(Float32Slice(l))
-}
-
-func Int64s(l []int64) {
-	sort.Sort(Int64Slice(l))
-}
-
-func Int32s(l []int32) {
-	sort.Sort(Int32Slice(l))
-}
-
-func Uint64s(l []uint64) {
-	sort.Sort(Uint64Slice(l))
-}
-
-func Uint32s(l []uint32) {
-	sort.Sort(Uint32Slice(l))
-}
-
-func Bools(l []bool) {
-	sort.Sort(BoolSlice(l))
-}
-
-type BoolSlice []bool
-
-func (p BoolSlice) Len() int           { return len(p) }
-func (p BoolSlice) Less(i, j int) bool { return p[j] }
-func (p BoolSlice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
-type Int64Slice []int64
-
-func (p Int64Slice) Len() int           { return len(p) }
-func (p Int64Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Int64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
-type Int32Slice []int32
-
-func (p Int32Slice) Len() int           { return len(p) }
-func (p Int32Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Int32Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
-type Uint64Slice []uint64
-
-func (p Uint64Slice) Len() int           { return len(p) }
-func (p Uint64Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Uint64Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
-type Uint32Slice []uint32
-
-func (p Uint32Slice) Len() int           { return len(p) }
-func (p Uint32Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Uint32Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
-
-type Float32Slice []float32
-
-func (p Float32Slice) Len() int           { return len(p) }
-func (p Float32Slice) Less(i, j int) bool { return p[i] < p[j] }
-func (p Float32Slice) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }