move dependencies to vendor

vendor/github.com/guelfey/go.dbus/introspect/call.go

@@ -0,0 +1,27 @@
+package introspect
+
+import (
+	"encoding/xml"
+	"github.com/guelfey/go.dbus"
+	"strings"
+)
+
+// Call calls org.freedesktop.Introspectable.Introspect on a remote object
+// and returns the introspection data.
+func Call(o *dbus.Object) (*Node, error) {
+	var xmldata string
+	var node Node
+
+	err := o.Call("org.freedesktop.DBus.Introspectable.Introspect", 0).Store(&xmldata)
+	if err != nil {
+		return nil, err
+	}
+	err = xml.NewDecoder(strings.NewReader(xmldata)).Decode(&node)
+	if err != nil {
+		return nil, err
+	}
+	if node.Name == "" {
+		node.Name = string(o.Path())
+	}
+	return &node, nil
+}