diff --git a/vendor/github.com/godbus/dbus/MAINTAINERS b/vendor/github.com/godbus/dbus/MAINTAINERS
index e8968ece..27618c9c 100644
--- a/vendor/github.com/godbus/dbus/MAINTAINERS
+++ b/vendor/github.com/godbus/dbus/MAINTAINERS
@@ -1,2 +1,3 @@
 Brandon Philips <brandon@ifup.org> (@philips)
 Brian Waldon <brian@waldon.cc> (@bcwaldon)
+John Southworth <jsouthwo@brocade.com> (@jsouthworth)
diff --git a/vendor/github.com/godbus/dbus/README.markdown b/vendor/github.com/godbus/dbus/README.markdown
index 0a6e7e5b..065f29f2 100644
--- a/vendor/github.com/godbus/dbus/README.markdown
+++ b/vendor/github.com/godbus/dbus/README.markdown
@@ -1,3 +1,5 @@
+[![Build Status](https://travis-ci.org/godbus/dbus.svg?branch=master)](https://travis-ci.org/godbus/dbus)
+
 dbus
 ----
 
diff --git a/vendor/github.com/godbus/dbus/conn.go b/vendor/github.com/godbus/dbus/conn.go
index 46f6914c..5d5e8c7e 100644
--- a/vendor/github.com/godbus/dbus/conn.go
+++ b/vendor/github.com/godbus/dbus/conn.go
@@ -16,6 +16,7 @@ var (
 	systemBusLck  sync.Mutex
 	sessionBus    *Conn
 	sessionBusLck sync.Mutex
+	sessionEnvLck sync.Mutex
 )
 
 // ErrClosed is the error returned by calls on a closed connection.
@@ -46,15 +47,13 @@ type Conn struct {
 	calls    map[uint32]*Call
 	callsLck sync.RWMutex
 
-	handlers    map[ObjectPath]map[string]exportWithMapping
-	handlersLck sync.RWMutex
+	handler Handler
 
 	out    chan *Message
 	closed bool
 	outLck sync.RWMutex
 
-	signals    []chan<- *Signal
-	signalsLck sync.Mutex
+	signalHandler SignalHandler
 
 	eavesdropped    chan<- *Message
 	eavesdroppedLck sync.Mutex
@@ -89,14 +88,33 @@ func SessionBus() (conn *Conn, err error) {
 	return
 }
 
-// SessionBusPrivate returns a new private connection to the session bus.
-func SessionBusPrivate() (*Conn, error) {
+func getSessionBusAddress() (string, error) {
+	sessionEnvLck.Lock()
+	defer sessionEnvLck.Unlock()
 	address := os.Getenv("DBUS_SESSION_BUS_ADDRESS")
 	if address != "" && address != "autolaunch:" {
-		return Dial(address)
+		return address, nil
+	}
+	return getSessionBusPlatformAddress()
+}
+
+// SessionBusPrivate returns a new private connection to the session bus.
+func SessionBusPrivate() (*Conn, error) {
+	address, err := getSessionBusAddress()
+	if err != nil {
+		return nil, err
 	}
 
-	return sessionBusPlatform()
+	return Dial(address)
+}
+
+// SessionBusPrivate returns a new private connection to the session bus.
+func SessionBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
+	address, err := getSessionBusAddress()
+	if err != nil {
+		return nil, err
+	}
+	return DialHandler(address, handler, signalHandler)
 }
 
 // SystemBus returns a shared connection to the system bus, connecting to it if
@@ -128,13 +146,22 @@ func SystemBus() (conn *Conn, err error) {
 	return
 }
 
-// SystemBusPrivate returns a new private connection to the system bus.
-func SystemBusPrivate() (*Conn, error) {
+func getSystemBusAddress() string {
 	address := os.Getenv("DBUS_SYSTEM_BUS_ADDRESS")
 	if address != "" {
-		return Dial(address)
+		return address
 	}
-	return Dial(defaultSystemBusAddress)
+	return defaultSystemBusAddress
+}
+
+// SystemBusPrivate returns a new private connection to the system bus.
+func SystemBusPrivate() (*Conn, error) {
+	return Dial(getSystemBusAddress())
+}
+
+// SystemBusPrivateHandler returns a new private connection to the system bus, using the provided handlers.
+func SystemBusPrivateHandler(handler Handler, signalHandler SignalHandler) (*Conn, error) {
+	return DialHandler(getSystemBusAddress(), handler, signalHandler)
 }
 
 // Dial establishes a new private connection to the message bus specified by address.
@@ -143,21 +170,36 @@ func Dial(address string) (*Conn, error) {
 	if err != nil {
 		return nil, err
 	}
-	return newConn(tr)
+	return newConn(tr, newDefaultHandler(), newDefaultSignalHandler())
+}
+
+// DialHandler establishes a new private connection to the message bus specified by address, using the supplied handlers.
+func DialHandler(address string, handler Handler, signalHandler SignalHandler) (*Conn, error) {
+	tr, err := getTransport(address)
+	if err != nil {
+		return nil, err
+	}
+	return newConn(tr, handler, signalHandler)
 }
 
 // NewConn creates a new private *Conn from an already established connection.
 func NewConn(conn io.ReadWriteCloser) (*Conn, error) {
-	return newConn(genericTransport{conn})
+	return NewConnHandler(conn, newDefaultHandler(), newDefaultSignalHandler())
+}
+
+// NewConnHandler creates a new private *Conn from an already established connection, using the supplied handlers.
+func NewConnHandler(conn io.ReadWriteCloser, handler Handler, signalHandler SignalHandler) (*Conn, error) {
+	return newConn(genericTransport{conn}, handler, signalHandler)
 }
 
 // newConn creates a new *Conn from a transport.
-func newConn(tr transport) (*Conn, error) {
+func newConn(tr transport, handler Handler, signalHandler SignalHandler) (*Conn, error) {
 	conn := new(Conn)
 	conn.transport = tr
 	conn.calls = make(map[uint32]*Call)
 	conn.out = make(chan *Message, 10)
-	conn.handlers = make(map[ObjectPath]map[string]exportWithMapping)
+	conn.handler = handler
+	conn.signalHandler = signalHandler
 	conn.nextSerial = 1
 	conn.serialUsed = map[uint32]bool{0: true}
 	conn.busObj = conn.Object("org.freedesktop.DBus", "/org/freedesktop/DBus")
@@ -185,16 +227,21 @@ func (conn *Conn) Close() error {
 	close(conn.out)
 	conn.closed = true
 	conn.outLck.Unlock()
-	conn.signalsLck.Lock()
-	for _, ch := range conn.signals {
-		close(ch)
+
+	if term, ok := conn.signalHandler.(Terminator); ok {
+		term.Terminate()
 	}
-	conn.signalsLck.Unlock()
+
+	if term, ok := conn.handler.(Terminator); ok {
+		term.Terminate()
+	}
+
 	conn.eavesdroppedLck.Lock()
 	if conn.eavesdropped != nil {
 		close(conn.eavesdropped)
 	}
 	conn.eavesdroppedLck.Unlock()
+
 	return conn.transport.Close()
 }
 
@@ -331,17 +378,7 @@ func (conn *Conn) inWorker() {
 						conn.namesLck.Unlock()
 					}
 				}
-				signal := &Signal{
-					Sender: sender,
-					Path:   msg.Headers[FieldPath].value.(ObjectPath),
-					Name:   iface + "." + member,
-					Body:   msg.Body,
-				}
-				conn.signalsLck.Lock()
-				for _, ch := range conn.signals {
-					ch <- signal
-				}
-				conn.signalsLck.Unlock()
+				go conn.handleSignal(msg)
 			case TypeMethodCall:
 				go conn.handleCall(msg)
 			}
@@ -362,6 +399,21 @@ func (conn *Conn) inWorker() {
 	}
 }
 
+func (conn *Conn) handleSignal(msg *Message) {
+	iface := msg.Headers[FieldInterface].value.(string)
+	member := msg.Headers[FieldMember].value.(string)
+	// as per http://dbus.freedesktop.org/doc/dbus-specification.html ,
+	// sender is optional for signals.
+	sender, _ := msg.Headers[FieldSender].value.(string)
+	signal := &Signal{
+		Sender: sender,
+		Path:   msg.Headers[FieldPath].value.(ObjectPath),
+		Name:   iface + "." + member,
+		Body:   msg.Body,
+	}
+	conn.signalHandler.DeliverSignal(iface, member, signal)
+}
+
 // Names returns the list of all names that are currently owned by this
 // connection. The slice is always at least one element long, the first element
 // being the unique name of the connection.
@@ -452,7 +504,19 @@ func (conn *Conn) Send(msg *Message, ch chan *Call) *Call {
 
 // sendError creates an error message corresponding to the parameters and sends
 // it to conn.out.
-func (conn *Conn) sendError(e Error, dest string, serial uint32) {
+func (conn *Conn) sendError(err error, dest string, serial uint32) {
+	var e *Error
+	switch em := err.(type) {
+	case Error:
+		e = &em
+	case *Error:
+		e = em
+	case DBusError:
+		name, body := em.DBusError()
+		e = NewError(name, body)
+	default:
+		e = MakeFailedError(err)
+	}
 	msg := new(Message)
 	msg.Type = TypeError
 	msg.serial = conn.getSerial()
@@ -495,6 +559,14 @@ func (conn *Conn) sendReply(dest string, serial uint32, values ...interface{}) {
 	conn.outLck.RUnlock()
 }
 
+func (conn *Conn) defaultSignalAction(fn func(h *defaultSignalHandler, ch chan<- *Signal), ch chan<- *Signal) {
+	if !isDefaultSignalHandler(conn.signalHandler) {
+		return
+	}
+	handler := conn.signalHandler.(*defaultSignalHandler)
+	fn(handler, ch)
+}
+
 // Signal registers the given channel to be passed all received signal messages.
 // The caller has to make sure that ch is sufficiently buffered; if a message
 // arrives when a write to c is not possible, it is discarded.
@@ -505,22 +577,12 @@ func (conn *Conn) sendReply(dest string, serial uint32, values ...interface{}) {
 // channel for eavesdropped messages, this channel receives all signals, and
 // none of the channels passed to Signal will receive any signals.
 func (conn *Conn) Signal(ch chan<- *Signal) {
-	conn.signalsLck.Lock()
-	conn.signals = append(conn.signals, ch)
-	conn.signalsLck.Unlock()
+	conn.defaultSignalAction((*defaultSignalHandler).addSignal, ch)
 }
 
 // RemoveSignal removes the given channel from the list of the registered channels.
 func (conn *Conn) RemoveSignal(ch chan<- *Signal) {
-	conn.signalsLck.Lock()
-	for i := len(conn.signals) - 1; i >= 0; i-- {
-		if ch == conn.signals[i] {
-			copy(conn.signals[i:], conn.signals[i+1:])
-			conn.signals[len(conn.signals)-1] = nil
-			conn.signals = conn.signals[:len(conn.signals)-1]
-		}
-	}
-	conn.signalsLck.Unlock()
+	conn.defaultSignalAction((*defaultSignalHandler).removeSignal, ch)
 }
 
 // SupportsUnixFDs returns whether the underlying transport supports passing of
@@ -621,16 +683,11 @@ func dereferenceAll(vs []interface{}) []interface{} {
 
 // getKey gets a key from a the list of keys. Returns "" on error / not found...
 func getKey(s, key string) string {
-	i := strings.Index(s, key)
-	if i == -1 {
-		return ""
+	for _, keyEqualsValue := range strings.Split(s, ",") {
+		keyValue := strings.SplitN(keyEqualsValue, "=", 2)
+		if len(keyValue) == 2 && keyValue[0] == key {
+			return keyValue[1]
+		}
 	}
-	if i+len(key)+1 >= len(s) || s[i+len(key)] != '=' {
-		return ""
-	}
-	j := strings.Index(s, ",")
-	if j == -1 {
-		j = len(s)
-	}
-	return s[i+len(key)+1 : j]
+	return ""
 }
diff --git a/vendor/github.com/godbus/dbus/conn_darwin.go b/vendor/github.com/godbus/dbus/conn_darwin.go
index b67bb1b8..5ca0e65c 100644
--- a/vendor/github.com/godbus/dbus/conn_darwin.go
+++ b/vendor/github.com/godbus/dbus/conn_darwin.go
@@ -5,17 +5,17 @@ import (
 	"os/exec"
 )
 
-func sessionBusPlatform() (*Conn, error) {
+func getSessionBusPlatformAddress() (string, error) {
 	cmd := exec.Command("launchctl", "getenv", "DBUS_LAUNCHD_SESSION_BUS_SOCKET")
 	b, err := cmd.CombinedOutput()
 
 	if err != nil {
-		return nil, err
+		return "", err
 	}
 
 	if len(b) == 0 {
-		return nil, errors.New("dbus: couldn't determine address of session bus")
+		return "", errors.New("dbus: couldn't determine address of session bus")
 	}
 
-	return Dial("unix:path=" + string(b[:len(b)-1]))
+	return "unix:path=" + string(b[:len(b)-1]), nil
 }
diff --git a/vendor/github.com/godbus/dbus/conn_other.go b/vendor/github.com/godbus/dbus/conn_other.go
index f74b8758..5d55f830 100644
--- a/vendor/github.com/godbus/dbus/conn_other.go
+++ b/vendor/github.com/godbus/dbus/conn_other.go
@@ -5,23 +5,27 @@ package dbus
 import (
 	"bytes"
 	"errors"
+	"os"
 	"os/exec"
 )
 
-func sessionBusPlatform() (*Conn, error) {
+func getSessionBusPlatformAddress() (string, error) {
 	cmd := exec.Command("dbus-launch")
 	b, err := cmd.CombinedOutput()
 
 	if err != nil {
-		return nil, err
+		return "", err
 	}
 
 	i := bytes.IndexByte(b, '=')
 	j := bytes.IndexByte(b, '\n')
 
 	if i == -1 || j == -1 {
-		return nil, errors.New("dbus: couldn't determine address of session bus")
+		return "", errors.New("dbus: couldn't determine address of session bus")
 	}
 
-	return Dial(string(b[i+1 : j]))
+	env, addr := string(b[0:i]), string(b[i+1:j])
+	os.Setenv(env, addr)
+
+	return addr, nil
 }
diff --git a/vendor/github.com/godbus/dbus/dbus.go b/vendor/github.com/godbus/dbus/dbus.go
index 2ce68735..a0b026c1 100644
--- a/vendor/github.com/godbus/dbus/dbus.go
+++ b/vendor/github.com/godbus/dbus/dbus.go
@@ -58,67 +58,164 @@ func store(src, dest interface{}) error {
 		reflect.ValueOf(dest).Elem().Set(reflect.ValueOf(src))
 		return nil
 	} else if hasStruct(dest) {
-		rv := reflect.ValueOf(dest).Elem()
-		switch rv.Kind() {
-		case reflect.Struct:
-			vs, ok := src.([]interface{})
-			if !ok {
-				return errors.New("dbus.Store: type mismatch")
-			}
-			t := rv.Type()
-			ndest := make([]interface{}, 0, rv.NumField())
-			for i := 0; i < rv.NumField(); i++ {
-				field := t.Field(i)
-				if field.PkgPath == "" && field.Tag.Get("dbus") != "-" {
-					ndest = append(ndest, rv.Field(i).Addr().Interface())
-				}
-			}
-			if len(vs) != len(ndest) {
-				return errors.New("dbus.Store: type mismatch")
-			}
-			err := Store(vs, ndest...)
-			if err != nil {
-				return errors.New("dbus.Store: type mismatch")
-			}
-		case reflect.Slice:
-			sv := reflect.ValueOf(src)
-			if sv.Kind() != reflect.Slice {
-				return errors.New("dbus.Store: type mismatch")
-			}
-			rv.Set(reflect.MakeSlice(rv.Type(), sv.Len(), sv.Len()))
-			for i := 0; i < sv.Len(); i++ {
-				if err := store(sv.Index(i).Interface(), rv.Index(i).Addr().Interface()); err != nil {
-					return err
-				}
-			}
-		case reflect.Map:
-			sv := reflect.ValueOf(src)
-			if sv.Kind() != reflect.Map {
-				return errors.New("dbus.Store: type mismatch")
-			}
-			keys := sv.MapKeys()
-			rv.Set(reflect.MakeMap(sv.Type()))
-			for _, key := range keys {
-				v := reflect.New(sv.Type().Elem())
-				if err := store(v, sv.MapIndex(key).Interface()); err != nil {
-					return err
-				}
-				rv.SetMapIndex(key, v.Elem())
-			}
-		default:
-			return errors.New("dbus.Store: type mismatch")
-		}
-		return nil
+		return storeStruct(src, dest)
+	} else if hasInterface(dest) {
+		return storeInterfaceContainer(src, dest)
 	} else {
 		return errors.New("dbus.Store: type mismatch")
 	}
 }
 
+func storeStruct(src, dest interface{}) error {
+	rv := reflect.ValueOf(dest)
+	if rv.Kind() == reflect.Interface || rv.Kind() == reflect.Ptr {
+		rv = rv.Elem()
+	}
+	switch rv.Kind() {
+	case reflect.Struct:
+		vs, ok := src.([]interface{})
+		if !ok {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		t := rv.Type()
+		ndest := make([]interface{}, 0, rv.NumField())
+		for i := 0; i < rv.NumField(); i++ {
+			field := t.Field(i)
+			if field.PkgPath == "" && field.Tag.Get("dbus") != "-" {
+				ndest = append(ndest, rv.Field(i).Addr().Interface())
+
+			}
+		}
+		if len(vs) != len(ndest) {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		err := Store(vs, ndest...)
+		if err != nil {
+			return errors.New("dbus.Store: type mismatch")
+		}
+	case reflect.Slice:
+		sv := reflect.ValueOf(src)
+		if sv.Kind() != reflect.Slice {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		rv.Set(reflect.MakeSlice(rv.Type(), sv.Len(), sv.Len()))
+		for i := 0; i < sv.Len(); i++ {
+			if err := store(sv.Index(i).Interface(), rv.Index(i).Addr().Interface()); err != nil {
+				return err
+			}
+		}
+	case reflect.Map:
+		sv := reflect.ValueOf(src)
+		if sv.Kind() != reflect.Map {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		keys := sv.MapKeys()
+		rv.Set(reflect.MakeMap(sv.Type()))
+		for _, key := range keys {
+			v := reflect.New(sv.Type().Elem())
+			if err := store(v, sv.MapIndex(key).Interface()); err != nil {
+				return err
+			}
+			rv.SetMapIndex(key, v.Elem())
+		}
+	default:
+		return errors.New("dbus.Store: type mismatch")
+	}
+	return nil
+}
+
+func storeInterfaceContainer(src, dest interface{}) error {
+	rv := reflect.ValueOf(dest).Elem()
+	switch rv.Kind() {
+	case reflect.Interface:
+		return storeInterfaceValue(src, dest)
+	case reflect.Slice:
+		sv := reflect.ValueOf(src)
+		if sv.Kind() != reflect.Slice {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		rv.Set(reflect.MakeSlice(rv.Type(), sv.Len(), sv.Len()))
+		for i := 0; i < sv.Len(); i++ {
+			v := newInterfaceImplValue(sv.Index(i))
+			err := store(getVariantValue(sv.Index(i)),
+				v.Interface())
+			if err != nil {
+				return err
+			}
+			rv.Index(i).Set(v.Elem())
+		}
+	case reflect.Map:
+		sv := reflect.ValueOf(src)
+		if sv.Kind() != reflect.Map {
+			return errors.New("dbus.Store: type mismatch")
+		}
+		keys := sv.MapKeys()
+		rv.Set(reflect.MakeMap(rv.Type()))
+		for _, key := range keys {
+			elemv := sv.MapIndex(key)
+			v := newInterfaceImplValue(elemv)
+			err := store(getVariantValue(elemv),
+				v.Interface())
+			if err != nil {
+				return err
+			}
+			rv.SetMapIndex(key, v.Elem())
+		}
+	default:
+		return errors.New("dbus.Store: type mismatch")
+	}
+	return nil
+}
+
+func getVariantValue(in reflect.Value) interface{} {
+	if in.Type() == variantType {
+		return in.Interface().(Variant).Value()
+	}
+	return in.Interface()
+}
+
+func newInterfaceImplValue(val reflect.Value) reflect.Value {
+	ifaceType := reflect.TypeOf((*interface{})(nil)).Elem()
+	if !hasVariant(val.Type()) {
+		return reflect.New(val.Type())
+	}
+	switch val.Kind() {
+	case reflect.Map:
+		return reflect.New(reflect.MapOf(val.Type().Key(),
+			ifaceType))
+	case reflect.Slice:
+		return reflect.New(reflect.SliceOf(ifaceType))
+	default:
+		return newInterfaceImplValue(
+			reflect.ValueOf(
+				val.Interface().(Variant).Value()))
+	}
+}
+
+func storeInterfaceValue(src, dest interface{}) error {
+	sv := reflect.ValueOf(src)
+	if sv.Type() == variantType {
+		store(src.(Variant).Value(), dest)
+	} else {
+		reflect.ValueOf(dest).Elem().Set(
+			reflect.ValueOf(src))
+	}
+	return nil
+}
+
 func hasStruct(v interface{}) bool {
+	return hasKind(v, reflect.Struct)
+}
+
+func hasInterface(v interface{}) bool {
+	return hasKind(v, reflect.Interface)
+}
+
+func hasKind(v interface{}, kind reflect.Kind) bool {
 	t := reflect.TypeOf(v)
 	for {
 		switch t.Kind() {
-		case reflect.Struct:
+		case kind:
 			return true
 		case reflect.Slice, reflect.Ptr, reflect.Map:
 			t = t.Elem()
@@ -128,6 +225,20 @@ func hasStruct(v interface{}) bool {
 	}
 }
 
+func hasVariant(t reflect.Type) bool {
+	for {
+		if t == variantType {
+			return true
+		}
+		switch t.Kind() {
+		case reflect.Slice, reflect.Ptr, reflect.Map:
+			t = t.Elem()
+		default:
+			return false
+		}
+	}
+}
+
 // An ObjectPath is an object path as defined by the D-Bus spec.
 type ObjectPath string
 
@@ -177,8 +288,8 @@ func alignment(t reflect.Type) int {
 		return 4
 	case signatureType:
 		return 1
-	case interfacesType: // sometimes used for structs
-		return 8
+	case interfacesType:
+		return 4
 	}
 	switch t.Kind() {
 	case reflect.Uint8:
diff --git a/vendor/github.com/godbus/dbus/default_handler.go b/vendor/github.com/godbus/dbus/default_handler.go
new file mode 100644
index 00000000..d32b553b
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/default_handler.go
@@ -0,0 +1,283 @@
+package dbus
+
+import (
+	"bytes"
+	"reflect"
+	"strings"
+	"sync"
+)
+
+func newIntrospectIntf(h *defaultHandler) *exportedIntf {
+	methods := make(map[string]Method)
+	methods["Introspect"] = exportedMethod{
+		reflect.ValueOf(func(msg Message) (string, *Error) {
+			path := msg.Headers[FieldPath].value.(ObjectPath)
+			return h.introspectPath(path), nil
+		}),
+	}
+	return newExportedIntf(methods, true)
+}
+
+func newDefaultHandler() *defaultHandler {
+	h := &defaultHandler{
+		objects:     make(map[ObjectPath]*exportedObj),
+		defaultIntf: make(map[string]*exportedIntf),
+	}
+	h.defaultIntf["org.freedesktop.DBus.Introspectable"] = newIntrospectIntf(h)
+	return h
+}
+
+type defaultHandler struct {
+	sync.RWMutex
+	objects     map[ObjectPath]*exportedObj
+	defaultIntf map[string]*exportedIntf
+}
+
+func (h *defaultHandler) PathExists(path ObjectPath) bool {
+	_, ok := h.objects[path]
+	return ok
+}
+
+func (h *defaultHandler) introspectPath(path ObjectPath) string {
+	subpath := make(map[string]struct{})
+	var xml bytes.Buffer
+	xml.WriteString("<node>")
+	for obj, _ := range h.objects {
+		p := string(path)
+		if p != "/" {
+			p += "/"
+		}
+		if strings.HasPrefix(string(obj), p) {
+			node_name := strings.Split(string(obj[len(p):]), "/")[0]
+			subpath[node_name] = struct{}{}
+		}
+	}
+	for s, _ := range subpath {
+		xml.WriteString("\n\t<node name=\"" + s + "\"/>")
+	}
+	xml.WriteString("\n</node>")
+	return xml.String()
+}
+
+func (h *defaultHandler) LookupObject(path ObjectPath) (ServerObject, bool) {
+	h.RLock()
+	defer h.RUnlock()
+	object, ok := h.objects[path]
+	if ok {
+		return object, ok
+	}
+
+	// If an object wasn't found for this exact path,
+	// look for a matching subtree registration
+	subtreeObject := newExportedObject()
+	path = path[:strings.LastIndex(string(path), "/")]
+	for len(path) > 0 {
+		object, ok = h.objects[path]
+		if ok {
+			for name, iface := range object.interfaces {
+				// Only include this handler if it registered for the subtree
+				if iface.isFallbackInterface() {
+					subtreeObject.interfaces[name] = iface
+				}
+			}
+			break
+		}
+
+		path = path[:strings.LastIndex(string(path), "/")]
+	}
+
+	for name, intf := range h.defaultIntf {
+		if _, exists := subtreeObject.interfaces[name]; exists {
+			continue
+		}
+		subtreeObject.interfaces[name] = intf
+	}
+
+	return subtreeObject, true
+}
+
+func (h *defaultHandler) AddObject(path ObjectPath, object *exportedObj) {
+	h.Lock()
+	h.objects[path] = object
+	h.Unlock()
+}
+
+func (h *defaultHandler) DeleteObject(path ObjectPath) {
+	h.Lock()
+	delete(h.objects, path)
+	h.Unlock()
+}
+
+type exportedMethod struct {
+	reflect.Value
+}
+
+func (m exportedMethod) Call(args ...interface{}) ([]interface{}, error) {
+	t := m.Type()
+
+	params := make([]reflect.Value, len(args))
+	for i := 0; i < len(args); i++ {
+		params[i] = reflect.ValueOf(args[i]).Elem()
+	}
+
+	ret := m.Value.Call(params)
+
+	err := ret[t.NumOut()-1].Interface().(*Error)
+	ret = ret[:t.NumOut()-1]
+	out := make([]interface{}, len(ret))
+	for i, val := range ret {
+		out[i] = val.Interface()
+	}
+	if err == nil {
+		//concrete type to interface nil is a special case
+		return out, nil
+	}
+	return out, err
+}
+
+func (m exportedMethod) NumArguments() int {
+	return m.Value.Type().NumIn()
+}
+
+func (m exportedMethod) ArgumentValue(i int) interface{} {
+	return reflect.Zero(m.Type().In(i)).Interface()
+}
+
+func (m exportedMethod) NumReturns() int {
+	return m.Value.Type().NumOut()
+}
+
+func (m exportedMethod) ReturnValue(i int) interface{} {
+	return reflect.Zero(m.Type().Out(i)).Interface()
+}
+
+func newExportedObject() *exportedObj {
+	return &exportedObj{
+		interfaces: make(map[string]*exportedIntf),
+	}
+}
+
+type exportedObj struct {
+	interfaces map[string]*exportedIntf
+}
+
+func (obj *exportedObj) LookupInterface(name string) (Interface, bool) {
+	if name == "" {
+		return obj, true
+	}
+	intf, exists := obj.interfaces[name]
+	return intf, exists
+}
+
+func (obj *exportedObj) AddInterface(name string, iface *exportedIntf) {
+	obj.interfaces[name] = iface
+}
+
+func (obj *exportedObj) DeleteInterface(name string) {
+	delete(obj.interfaces, name)
+}
+
+func (obj *exportedObj) LookupMethod(name string) (Method, bool) {
+	for _, intf := range obj.interfaces {
+		method, exists := intf.LookupMethod(name)
+		if exists {
+			return method, exists
+		}
+	}
+	return nil, false
+}
+
+func (obj *exportedObj) isFallbackInterface() bool {
+	return false
+}
+
+func newExportedIntf(methods map[string]Method, includeSubtree bool) *exportedIntf {
+	return &exportedIntf{
+		methods:        methods,
+		includeSubtree: includeSubtree,
+	}
+}
+
+type exportedIntf struct {
+	methods map[string]Method
+
+	// Whether or not this export is for the entire subtree
+	includeSubtree bool
+}
+
+func (obj *exportedIntf) LookupMethod(name string) (Method, bool) {
+	out, exists := obj.methods[name]
+	return out, exists
+}
+
+func (obj *exportedIntf) isFallbackInterface() bool {
+	return obj.includeSubtree
+}
+
+func newDefaultSignalHandler() *defaultSignalHandler {
+	return &defaultSignalHandler{}
+}
+
+func isDefaultSignalHandler(handler SignalHandler) bool {
+	_, ok := handler.(*defaultSignalHandler)
+	return ok
+}
+
+type defaultSignalHandler struct {
+	sync.RWMutex
+	closed  bool
+	signals []chan<- *Signal
+}
+
+func (sh *defaultSignalHandler) DeliverSignal(intf, name string, signal *Signal) {
+	sh.RLock()
+	defer sh.RUnlock()
+	if sh.closed {
+		return
+	}
+	for _, ch := range sh.signals {
+		ch <- signal
+	}
+}
+
+func (sh *defaultSignalHandler) Init() error {
+	sh.Lock()
+	sh.signals = make([]chan<- *Signal, 0)
+	sh.Unlock()
+	return nil
+}
+
+func (sh *defaultSignalHandler) Terminate() {
+	sh.Lock()
+	sh.closed = true
+	for _, ch := range sh.signals {
+		close(ch)
+	}
+	sh.signals = nil
+	sh.Unlock()
+}
+
+func (sh *defaultSignalHandler) addSignal(ch chan<- *Signal) {
+	sh.Lock()
+	defer sh.Unlock()
+	if sh.closed {
+		return
+	}
+	sh.signals = append(sh.signals, ch)
+
+}
+
+func (sh *defaultSignalHandler) removeSignal(ch chan<- *Signal) {
+	sh.Lock()
+	defer sh.Unlock()
+	if sh.closed {
+		return
+	}
+	for i := len(sh.signals) - 1; i >= 0; i-- {
+		if ch == sh.signals[i] {
+			copy(sh.signals[i:], sh.signals[i+1:])
+			sh.signals[len(sh.signals)-1] = nil
+			sh.signals = sh.signals[:len(sh.signals)-1]
+		}
+	}
+}
diff --git a/vendor/github.com/godbus/dbus/encoder.go b/vendor/github.com/godbus/dbus/encoder.go
index 9f0a9e89..7e3e4798 100644
--- a/vendor/github.com/godbus/dbus/encoder.go
+++ b/vendor/github.com/godbus/dbus/encoder.go
@@ -202,6 +202,8 @@ func (enc *encoder) encode(v reflect.Value, depth int) {
 			panic(err)
 		}
 		enc.pos += length
+	case reflect.Interface:
+		enc.encode(reflect.ValueOf(MakeVariant(v.Interface())), depth)
 	default:
 		panic(InvalidTypeError{v.Type()})
 	}
diff --git a/vendor/github.com/godbus/dbus/export.go b/vendor/github.com/godbus/dbus/export.go
index c6440a74..aae97088 100644
--- a/vendor/github.com/godbus/dbus/export.go
+++ b/vendor/github.com/godbus/dbus/export.go
@@ -8,167 +8,73 @@ import (
 )
 
 var (
-	errmsgInvalidArg = Error{
+	ErrMsgInvalidArg = Error{
 		"org.freedesktop.DBus.Error.InvalidArgs",
 		[]interface{}{"Invalid type / number of args"},
 	}
-	errmsgNoObject = Error{
+	ErrMsgNoObject = Error{
 		"org.freedesktop.DBus.Error.NoSuchObject",
 		[]interface{}{"No such object"},
 	}
-	errmsgUnknownMethod = Error{
+	ErrMsgUnknownMethod = Error{
 		"org.freedesktop.DBus.Error.UnknownMethod",
 		[]interface{}{"Unknown / invalid method"},
 	}
+	ErrMsgUnknownInterface = Error{
+		"org.freedesktop.DBus.Error.UnknownInterface",
+		[]interface{}{"Object does not implement the interface"},
+	}
 )
 
-// exportWithMapping represents an exported struct along with a method name
-// mapping to allow for exporting lower-case methods, etc.
-type exportWithMapping struct {
-	export interface{}
-
-	// Method name mapping; key -> struct method, value -> dbus method.
-	mapping map[string]string
-
-	// Whether or not this export is for the entire subtree
-	includeSubtree bool
+func MakeFailedError(err error) *Error {
+	return &Error{
+		"org.freedesktop.DBus.Error.Failed",
+		[]interface{}{err.Error()},
+	}
 }
 
 // Sender is a type which can be used in exported methods to receive the message
 // sender.
 type Sender string
 
-func exportedMethod(export exportWithMapping, name string) reflect.Value {
-	if export.export == nil {
-		return reflect.Value{}
-	}
-
-	// If a mapping was included in the export, check the map to see if we
-	// should be looking for a different method in the export.
-	if export.mapping != nil {
-		for key, value := range export.mapping {
-			if value == name {
-				name = key
-				break
-			}
-
-			// Catch the case where a method is aliased but the client is calling
-			// the original, e.g. the "Foo" method was exported mapped to
-			// "foo," and dbus client called the original "Foo."
-			if key == name {
-				return reflect.Value{}
-			}
-		}
-	}
-
-	value := reflect.ValueOf(export.export)
-	m := value.MethodByName(name)
-
-	// Catch the case of attempting to call an unexported method
-	method, ok := value.Type().MethodByName(name)
-
-	if !m.IsValid() || !ok || method.PkgPath != "" {
-		return reflect.Value{}
-	}
-	t := m.Type()
-	if t.NumOut() == 0 ||
-		t.Out(t.NumOut()-1) != reflect.TypeOf(&errmsgInvalidArg) {
-
-		return reflect.Value{}
-	}
-	return m
-}
-
-// searchHandlers will look through all registered handlers looking for one
-// to handle the given path. If a verbatim one isn't found, it will check for
-// a subtree registration for the path as well.
-func (conn *Conn) searchHandlers(path ObjectPath) (map[string]exportWithMapping, bool) {
-	conn.handlersLck.RLock()
-	defer conn.handlersLck.RUnlock()
-
-	handlers, ok := conn.handlers[path]
+func computeMethodName(name string, mapping map[string]string) string {
+	newname, ok := mapping[name]
 	if ok {
-		return handlers, ok
+		name = newname
 	}
-
-	// If handlers weren't found for this exact path, look for a matching subtree
-	// registration
-	handlers = make(map[string]exportWithMapping)
-	path = path[:strings.LastIndex(string(path), "/")]
-	for len(path) > 0 {
-		var subtreeHandlers map[string]exportWithMapping
-		subtreeHandlers, ok = conn.handlers[path]
-		if ok {
-			for iface, handler := range subtreeHandlers {
-				// Only include this handler if it registered for the subtree
-				if handler.includeSubtree {
-					handlers[iface] = handler
-				}
-			}
-
-			break
-		}
-
-		path = path[:strings.LastIndex(string(path), "/")]
-	}
-
-	return handlers, ok
+	return name
 }
 
-// handleCall handles the given method call (i.e. looks if it's one of the
-// pre-implemented ones and searches for a corresponding handler if not).
-func (conn *Conn) handleCall(msg *Message) {
-	name := msg.Headers[FieldMember].value.(string)
-	path := msg.Headers[FieldPath].value.(ObjectPath)
-	ifaceName, hasIface := msg.Headers[FieldInterface].value.(string)
-	sender, hasSender := msg.Headers[FieldSender].value.(string)
-	serial := msg.serial
-	if ifaceName == "org.freedesktop.DBus.Peer" {
-		switch name {
-		case "Ping":
-			conn.sendReply(sender, serial)
-		case "GetMachineId":
-			conn.sendReply(sender, serial, conn.uuid)
-		default:
-			conn.sendError(errmsgUnknownMethod, sender, serial)
+func getMethods(in interface{}, mapping map[string]string) map[string]reflect.Value {
+	if in == nil {
+		return nil
+	}
+	methods := make(map[string]reflect.Value)
+	val := reflect.ValueOf(in)
+	typ := val.Type()
+	for i := 0; i < typ.NumMethod(); i++ {
+		methtype := typ.Method(i)
+		method := val.Method(i)
+		t := method.Type()
+		// only track valid methods must return *Error as last arg
+		// and must be exported
+		if t.NumOut() == 0 ||
+			t.Out(t.NumOut()-1) != reflect.TypeOf(&ErrMsgInvalidArg) ||
+			methtype.PkgPath != "" {
+			continue
 		}
-		return
-	}
-	if len(name) == 0 {
-		conn.sendError(errmsgUnknownMethod, sender, serial)
+		// map names while building table
+		methods[computeMethodName(methtype.Name, mapping)] = method
 	}
+	return methods
+}
 
-	// Find the exported handler (if any) for this path
-	handlers, ok := conn.searchHandlers(path)
-	if !ok {
-		conn.sendError(errmsgNoObject, sender, serial)
-		return
-	}
+func standardMethodArgumentDecode(m Method, sender string, msg *Message, body []interface{}) ([]interface{}, error) {
+	pointers := make([]interface{}, m.NumArguments())
+	decode := make([]interface{}, 0, len(body))
 
-	var m reflect.Value
-	if hasIface {
-		iface := handlers[ifaceName]
-		m = exportedMethod(iface, name)
-	} else {
-		for _, v := range handlers {
-			m = exportedMethod(v, name)
-			if m.IsValid() {
-				break
-			}
-		}
-	}
-
-	if !m.IsValid() {
-		conn.sendError(errmsgUnknownMethod, sender, serial)
-		return
-	}
-
-	t := m.Type()
-	vs := msg.Body
-	pointers := make([]interface{}, t.NumIn())
-	decode := make([]interface{}, 0, len(vs))
-	for i := 0; i < t.NumIn(); i++ {
-		tp := t.In(i)
+	for i := 0; i < m.NumArguments(); i++ {
+		tp := reflect.TypeOf(m.ArgumentValue(i))
 		val := reflect.New(tp)
 		pointers[i] = val.Interface()
 		if tp == reflect.TypeOf((*Sender)(nil)).Elem() {
@@ -180,26 +86,73 @@ func (conn *Conn) handleCall(msg *Message) {
 		}
 	}
 
-	if len(decode) != len(vs) {
-		conn.sendError(errmsgInvalidArg, sender, serial)
+	if len(decode) != len(body) {
+		return nil, ErrMsgInvalidArg
+	}
+
+	if err := Store(body, decode...); err != nil {
+		return nil, ErrMsgInvalidArg
+	}
+
+	return pointers, nil
+}
+
+func (conn *Conn) decodeArguments(m Method, sender string, msg *Message) ([]interface{}, error) {
+	if decoder, ok := m.(ArgumentDecoder); ok {
+		return decoder.DecodeArguments(conn, sender, msg, msg.Body)
+	}
+	return standardMethodArgumentDecode(m, sender, msg, msg.Body)
+}
+
+// handleCall handles the given method call (i.e. looks if it's one of the
+// pre-implemented ones and searches for a corresponding handler if not).
+func (conn *Conn) handleCall(msg *Message) {
+	name := msg.Headers[FieldMember].value.(string)
+	path := msg.Headers[FieldPath].value.(ObjectPath)
+	ifaceName, _ := msg.Headers[FieldInterface].value.(string)
+	sender, hasSender := msg.Headers[FieldSender].value.(string)
+	serial := msg.serial
+	if ifaceName == "org.freedesktop.DBus.Peer" {
+		switch name {
+		case "Ping":
+			conn.sendReply(sender, serial)
+		case "GetMachineId":
+			conn.sendReply(sender, serial, conn.uuid)
+		default:
+			conn.sendError(ErrMsgUnknownMethod, sender, serial)
+		}
+		return
+	}
+	if len(name) == 0 {
+		conn.sendError(ErrMsgUnknownMethod, sender, serial)
+	}
+
+	object, ok := conn.handler.LookupObject(path)
+	if !ok {
+		conn.sendError(ErrMsgNoObject, sender, serial)
 		return
 	}
 
-	if err := Store(vs, decode...); err != nil {
-		conn.sendError(errmsgInvalidArg, sender, serial)
+	iface, exists := object.LookupInterface(ifaceName)
+	if !exists {
+		conn.sendError(ErrMsgUnknownInterface, sender, serial)
 		return
 	}
 
-	// Extract parameters
-	params := make([]reflect.Value, len(pointers))
-	for i := 0; i < len(pointers); i++ {
-		params[i] = reflect.ValueOf(pointers[i]).Elem()
+	m, exists := iface.LookupMethod(name)
+	if !exists {
+		conn.sendError(ErrMsgUnknownMethod, sender, serial)
+		return
+	}
+	args, err := conn.decodeArguments(m, sender, msg)
+	if err != nil {
+		conn.sendError(err, sender, serial)
+		return
 	}
 
-	// Call method
-	ret := m.Call(params)
-	if em := ret[t.NumOut()-1].Interface().(*Error); em != nil {
-		conn.sendError(*em, sender, serial)
+	ret, err := m.Call(args...)
+	if err != nil {
+		conn.sendError(err, sender, serial)
 		return
 	}
 
@@ -212,13 +165,11 @@ func (conn *Conn) handleCall(msg *Message) {
 			reply.Headers[FieldDestination] = msg.Headers[FieldSender]
 		}
 		reply.Headers[FieldReplySerial] = MakeVariant(msg.serial)
-		reply.Body = make([]interface{}, len(ret)-1)
-		for i := 0; i < len(ret)-1; i++ {
-			reply.Body[i] = ret[i].Interface()
-		}
-		if len(ret) != 1 {
-			reply.Headers[FieldSignature] = MakeVariant(SignatureOf(reply.Body...))
+		reply.Body = make([]interface{}, len(ret))
+		for i := 0; i < len(ret); i++ {
+			reply.Body[i] = ret[i]
 		}
+		reply.Headers[FieldSignature] = MakeVariant(SignatureOf(reply.Body...))
 		conn.outLck.RLock()
 		if !conn.closed {
 			conn.out <- reply
@@ -303,7 +254,7 @@ func (conn *Conn) Export(v interface{}, path ObjectPath, iface string) error {
 // The keys in the map are the real method names (exported on the struct), and
 // the values are the method names to be exported on DBus.
 func (conn *Conn) ExportWithMap(v interface{}, mapping map[string]string, path ObjectPath, iface string) error {
-	return conn.exportWithMap(v, mapping, path, iface, false)
+	return conn.export(getMethods(v, mapping), path, iface, false)
 }
 
 // ExportSubtree works exactly like Export but registers the given value for
@@ -326,38 +277,89 @@ func (conn *Conn) ExportSubtree(v interface{}, path ObjectPath, iface string) er
 // The keys in the map are the real method names (exported on the struct), and
 // the values are the method names to be exported on DBus.
 func (conn *Conn) ExportSubtreeWithMap(v interface{}, mapping map[string]string, path ObjectPath, iface string) error {
-	return conn.exportWithMap(v, mapping, path, iface, true)
+	return conn.export(getMethods(v, mapping), path, iface, true)
+}
+
+// ExportMethodTable like Export registers the given methods as an object
+// on the message bus. Unlike Export the it uses a method table to define
+// the object instead of a native go object.
+//
+// The method table is a map from method name to function closure
+// representing the method. This allows an object exported on the bus to not
+// necessarily be a native go object. It can be useful for generating exposed
+// methods on the fly.
+//
+// Any non-function objects in the method table are ignored.
+func (conn *Conn) ExportMethodTable(methods map[string]interface{}, path ObjectPath, iface string) error {
+	return conn.exportMethodTable(methods, path, iface, false)
+}
+
+// Like ExportSubtree, but with the same caveats as ExportMethodTable.
+func (conn *Conn) ExportSubtreeMethodTable(methods map[string]interface{}, path ObjectPath, iface string) error {
+	return conn.exportMethodTable(methods, path, iface, true)
+}
+
+func (conn *Conn) exportMethodTable(methods map[string]interface{}, path ObjectPath, iface string, includeSubtree bool) error {
+	out := make(map[string]reflect.Value)
+	for name, method := range methods {
+		rval := reflect.ValueOf(method)
+		if rval.Kind() != reflect.Func {
+			continue
+		}
+		t := rval.Type()
+		// only track valid methods must return *Error as last arg
+		if t.NumOut() == 0 ||
+			t.Out(t.NumOut()-1) != reflect.TypeOf(&ErrMsgInvalidArg) {
+			continue
+		}
+		out[name] = rval
+	}
+	return conn.export(out, path, iface, includeSubtree)
+}
+
+func (conn *Conn) unexport(h *defaultHandler, path ObjectPath, iface string) error {
+	if h.PathExists(path) {
+		obj := h.objects[path]
+		obj.DeleteInterface(iface)
+		if len(obj.interfaces) == 0 {
+			h.DeleteObject(path)
+		}
+	}
+	return nil
 }
 
 // exportWithMap is the worker function for all exports/registrations.
-func (conn *Conn) exportWithMap(v interface{}, mapping map[string]string, path ObjectPath, iface string, includeSubtree bool) error {
+func (conn *Conn) export(methods map[string]reflect.Value, path ObjectPath, iface string, includeSubtree bool) error {
+	h, ok := conn.handler.(*defaultHandler)
+	if !ok {
+		return fmt.Errorf(
+			`dbus: export only allowed on the default hander handler have %T"`,
+			conn.handler)
+	}
+
 	if !path.IsValid() {
 		return fmt.Errorf(`dbus: Invalid path name: "%s"`, path)
 	}
 
-	conn.handlersLck.Lock()
-	defer conn.handlersLck.Unlock()
-
 	// Remove a previous export if the interface is nil
-	if v == nil {
-		if _, ok := conn.handlers[path]; ok {
-			delete(conn.handlers[path], iface)
-			if len(conn.handlers[path]) == 0 {
-				delete(conn.handlers, path)
-			}
-		}
-
-		return nil
+	if methods == nil {
+		return conn.unexport(h, path, iface)
 	}
 
 	// If this is the first handler for this path, make a new map to hold all
 	// handlers for this path.
-	if _, ok := conn.handlers[path]; !ok {
-		conn.handlers[path] = make(map[string]exportWithMapping)
+	if !h.PathExists(path) {
+		h.AddObject(path, newExportedObject())
+	}
+
+	exportedMethods := make(map[string]Method)
+	for name, method := range methods {
+		exportedMethods[name] = exportedMethod{method}
 	}
 
 	// Finally, save this handler
-	conn.handlers[path][iface] = exportWithMapping{export: v, mapping: mapping, includeSubtree: includeSubtree}
+	obj := h.objects[path]
+	obj.AddInterface(iface, newExportedIntf(exportedMethods, includeSubtree))
 
 	return nil
 }
diff --git a/vendor/github.com/godbus/dbus/message.go b/vendor/github.com/godbus/dbus/message.go
index 075d6e38..6a925367 100644
--- a/vendor/github.com/godbus/dbus/message.go
+++ b/vendor/github.com/godbus/dbus/message.go
@@ -22,6 +22,13 @@ const (
 	// FlagNoAutoStart signals that the message bus should not automatically
 	// start an application when handling this message.
 	FlagNoAutoStart
+	// FlagAllowInteractiveAuthorization may be set on a method call
+	// message to inform the receiving side that the caller is prepared
+	// to wait for interactive authorization, which might take a
+	// considerable time to complete. For instance, if this flag is set,
+	// it would be appropriate to query the user for passwords or
+	// confirmation via Polkit or a similar framework.
+	FlagAllowInteractiveAuthorization
 )
 
 // Type represents the possible types of a D-Bus message.
@@ -248,7 +255,7 @@ func (msg *Message) EncodeTo(out io.Writer, order binary.ByteOrder) error {
 // IsValid checks whether msg is a valid message and returns an
 // InvalidMessageError if it is not.
 func (msg *Message) IsValid() error {
-	if msg.Flags & ^(FlagNoAutoStart|FlagNoReplyExpected) != 0 {
+	if msg.Flags & ^(FlagNoAutoStart|FlagNoReplyExpected|FlagAllowInteractiveAuthorization) != 0 {
 		return InvalidMessageError("invalid flags")
 	}
 	if msg.Type == 0 || msg.Type >= typeMax {
diff --git a/vendor/github.com/godbus/dbus/server_interfaces.go b/vendor/github.com/godbus/dbus/server_interfaces.go
new file mode 100644
index 00000000..091948ae
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/server_interfaces.go
@@ -0,0 +1,89 @@
+package dbus
+
+// Terminator allows a handler to implement a shutdown mechanism that
+// is called when the connection terminates.
+type Terminator interface {
+	Terminate()
+}
+
+// Handler is the representation of a D-Bus Application.
+//
+// The Handler must have a way to lookup objects given
+// an ObjectPath. The returned object must implement the
+// ServerObject interface.
+type Handler interface {
+	LookupObject(path ObjectPath) (ServerObject, bool)
+}
+
+// ServerObject is the representation of an D-Bus Object.
+//
+// Objects are registered at a path for a given Handler.
+// The Objects implement D-Bus interfaces. The semantics
+// of Interface lookup is up to the implementation of
+// the ServerObject. The ServerObject implementation may
+// choose to implement empty string as a valid interface
+// represeting all methods or not per the D-Bus specification.
+type ServerObject interface {
+	LookupInterface(name string) (Interface, bool)
+}
+
+// An Interface is the representation of a D-Bus Interface.
+//
+// Interfaces are a grouping of methods implemented by the Objects.
+// Interfaces are responsible for routing method calls.
+type Interface interface {
+	LookupMethod(name string) (Method, bool)
+}
+
+// A Method represents the exposed methods on D-Bus.
+type Method interface {
+	// Call requires that all arguments are decoded before being passed to it.
+	Call(args ...interface{}) ([]interface{}, error)
+	NumArguments() int
+	NumReturns() int
+	// ArgumentValue returns a representative value for the argument at position
+	// it should be of the proper type. reflect.Zero would be a good mechanism
+	// to use for this Value.
+	ArgumentValue(position int) interface{}
+	// ReturnValue returns a representative value for the return at position
+	// it should be of the proper type. reflect.Zero would be a good mechanism
+	// to use for this Value.
+	ReturnValue(position int) interface{}
+}
+
+// An Argument Decoder can decode arguments using the non-standard mechanism
+//
+// If a method implements this interface then the non-standard
+// decoder will be used.
+//
+// Method arguments must be decoded from the message.
+// The mechanism for doing this will vary based on the
+// implementation of the method. A normal approach is provided
+// as part of this library, but may be replaced with
+// any other decoding scheme.
+type ArgumentDecoder interface {
+	// To decode the arguments of a method the sender and message are
+	// provided incase the semantics of the implementer provides access
+	// to these as part of the method invocation.
+	DecodeArguments(conn *Conn, sender string, msg *Message, args []interface{}) ([]interface{}, error)
+}
+
+// A SignalHandler is responsible for delivering a signal.
+//
+// Signal delivery may be changed from the default channel
+// based approach by Handlers implementing the SignalHandler
+// interface.
+type SignalHandler interface {
+	DeliverSignal(iface, name string, signal *Signal)
+}
+
+// A DBusError is used to convert a generic object to a D-Bus error.
+//
+// Any custom error mechanism may implement this interface to provide
+// a custom encoding of the error on D-Bus. By default if a normal
+// error is returned, it will be encoded as the generic
+// "org.freedesktop.DBus.Error.Failed" error. By implementing this
+// interface as well a custom encoding may be provided.
+type DBusError interface {
+	DBusError() (string, []interface{})
+}
diff --git a/vendor/github.com/godbus/dbus/sig.go b/vendor/github.com/godbus/dbus/sig.go
index f45b53ce..12a364a4 100644
--- a/vendor/github.com/godbus/dbus/sig.go
+++ b/vendor/github.com/godbus/dbus/sig.go
@@ -101,6 +101,8 @@ func getSignature(t reflect.Type) string {
 			panic(InvalidTypeError{t})
 		}
 		return "a{" + getSignature(t.Key()) + getSignature(t.Elem()) + "}"
+	case reflect.Interface:
+		return "v"
 	}
 	panic(InvalidTypeError{t})
 }
@@ -162,7 +164,7 @@ func (e SignatureError) Error() string {
 	return fmt.Sprintf("dbus: invalid signature: %q (%s)", e.Sig, e.Reason)
 }
 
-// Try to read a single type from this string. If it was successfull, err is nil
+// Try to read a single type from this string. If it was successful, err is nil
 // and rem is the remaining unparsed part. Otherwise, err is a non-nil
 // SignatureError and rem is "". depth is the current recursion depth which may
 // not be greater than 64 and should be given as 0 on the first call.
diff --git a/vendor/github.com/godbus/dbus/transport_tcp.go b/vendor/github.com/godbus/dbus/transport_tcp.go
new file mode 100644
index 00000000..dd1c8e59
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/transport_tcp.go
@@ -0,0 +1,43 @@
+//+build !windows
+
+package dbus
+
+import (
+	"errors"
+	"net"
+)
+
+func init() {
+	transports["tcp"] = newTcpTransport
+}
+
+func tcpFamily(keys string) (string, error) {
+	switch getKey(keys, "family") {
+	case "":
+		return "tcp", nil
+	case "ipv4":
+		return "tcp4", nil
+	case "ipv6":
+		return "tcp6", nil
+	default:
+		return "", errors.New("dbus: invalid tcp family (must be ipv4 or ipv6)")
+	}
+}
+
+func newTcpTransport(keys string) (transport, error) {
+	host := getKey(keys, "host")
+	port := getKey(keys, "port")
+	if host == "" || port == "" {
+		return nil, errors.New("dbus: unsupported address (must set host and port)")
+	}
+
+	protocol, err := tcpFamily(keys)
+	if err != nil {
+		return nil, err
+	}
+	socket, err := net.Dial(protocol, net.JoinHostPort(host, port))
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(socket)
+}
diff --git a/vendor/github.com/godbus/dbus/transport_unix.go b/vendor/github.com/godbus/dbus/transport_unix.go
index 3fafeabb..a1d00cbc 100644
--- a/vendor/github.com/godbus/dbus/transport_unix.go
+++ b/vendor/github.com/godbus/dbus/transport_unix.go
@@ -1,4 +1,4 @@
-//+build !windows
+//+build !windows,!solaris
 
 package dbus
 
diff --git a/vendor/github.com/godbus/dbus/transport_unixcred_openbsd.go b/vendor/github.com/godbus/dbus/transport_unixcred_openbsd.go
new file mode 100644
index 00000000..af7bafdf
--- /dev/null
+++ b/vendor/github.com/godbus/dbus/transport_unixcred_openbsd.go
@@ -0,0 +1,14 @@
+package dbus
+
+import "io"
+
+func (t *unixTransport) SendNullByte() error {
+	n, _, err := t.UnixConn.WriteMsgUnix([]byte{0}, nil, nil)
+	if err != nil {
+		return err
+	}
+	if n != 1 {
+		return io.ErrShortWrite
+	}
+	return nil
+}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 07b1cd4c..5a9524f2 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -27,9 +27,10 @@
 			"revisionTime": "2016-11-09T15:11:19Z"
 		},
 		{
+			"checksumSHA1": "Y03oV8ua8TBsSFozViEo7U4dXCE=",
 			"path": "github.com/godbus/dbus",
-			"revision": "e4593d66e29678c26f84166fe231a03e0268ced5",
-			"revisionTime": "2016-01-07T17:08:41+05:30"
+			"revision": "4b24ebee04561bf8a3bcc09aead82062edc56778",
+			"revisionTime": "2016-12-02T21:35:00Z"
 		},
 		{
 			"path": "github.com/golang/protobuf/proto",