Migrating from govendor to go dep

Change-Id: I08f2863450e141f1fed0bdef4b9ba64157c7289d
diff --git a/vendor/github.com/Sirupsen/logrus/terminal_windows.go b/vendor/github.com/Sirupsen/logrus/terminal_windows.go
index 3727e8a..b4ef528 100644
--- a/vendor/github.com/Sirupsen/logrus/terminal_windows.go
+++ b/vendor/github.com/Sirupsen/logrus/terminal_windows.go
@@ -1,27 +1,18 @@
-// Based on ssh/terminal:
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build windows,!appengine
+// +build !appengine,!js,windows
 
 package logrus
 
 import (
+	"io"
+	"os"
 	"syscall"
-	"unsafe"
+
+	sequences "github.com/konsorten/go-windows-terminal-sequences"
 )
 
-var kernel32 = syscall.NewLazyDLL("kernel32.dll")
-
-var (
-	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
-)
-
-// IsTerminal returns true if stderr's file descriptor is a terminal.
-func IsTerminal() bool {
-	fd := syscall.Stderr
-	var st uint32
-	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
-	return r != 0 && e == 0
+func initTerminal(w io.Writer) {
+	switch v := w.(type) {
+	case *os.File:
+		sequences.EnableVirtualTerminalProcessing(syscall.Handle(v.Fd()), true)
+	}
 }