Windows support (#15)

* Begin adding better windows support

* Support colors and output on windows

pkg/color/coloring.go

@@ -3,7 +3,6 @@ package color
 import (
 	"fmt"
 	"os"
-	"runtime"
 	"strings"
 )
 
@@ -43,9 +42,7 @@ var Enabled = true
 var groupColors = [...]ColorCode{Red, Green, Yellow, Blue, Magenta, Cyan}
 
 func init() {
-	if runtime.GOOS == "windows" {
-		Enabled = false
-	} else if fi, err := os.Stdout.Stat(); err == nil {
+	if fi, err := os.Stdout.Stat(); err == nil {
 		if (fi.Mode() & os.ModeCharDevice) == 0 {
 			Enabled = false
 		}

pkg/multiterm/multiterm_windows.go

@@ -0,0 +1,24 @@
+package multiterm
+
+import (
+	"golang.org/x/sys/windows"
+	"os"
+)
+
+func addFlagToWindowsTerm(file *os.File) error {
+	term := windows.Handle(file.Fd())
+	var outMode uint32
+	if err := windows.GetConsoleMode(term, &outMode); err == nil {
+		if err := windows.SetConsoleMode(term, outMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING); err != nil {
+			return err
+		}
+	} else {
+		return err
+	}
+	return nil
+}
+
+func init() {
+	addFlagToWindowsTerm(os.Stdout)
+	addFlagToWindowsTerm(os.Stderr)
+}