ANSI terminal emulation for windows

It is implemented by intercepting and interpreting the output
escape sequence by calling win32 console apis.

In addition the input from win32 console is translated to linux keycodes

Signed-off-by: Sachin Joshi <sachin_jayant_joshi@hotmail.com>

term/term.go

@@ -4,6 +4,7 @@ package term
 
 import (
 	"errors"
+	"io"
 	"os"
 	"os/signal"
 	"syscall"
@@ -25,6 +26,20 @@ type Winsize struct {
 	y      uint16
 }
 
+func StdStreams() (stdOut io.Writer, stdErr io.Writer, stdIn io.ReadCloser) {
+	return os.Stdout, os.Stderr, os.Stdin
+}
+
+func GetHandleInfo(in interface{}) (uintptr, bool) {
+	var inFd uintptr
+	var isTerminalIn bool
+	if file, ok := in.(*os.File); ok {
+		inFd = file.Fd()
+		isTerminalIn = IsTerminal(inFd)
+	}
+	return inFd, isTerminalIn
+}
+
 func GetWinsize(fd uintptr) (*Winsize, error) {
 	ws := &Winsize{}
 	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(ws)))