add browse command and implement -b option for most operations

vendor/github.com/pkg/browser/examples/Open/main.go

@@ -0,0 +1,50 @@
+// Open is a simple example of the github.com/pkg/browser package.
+//
+// Usage:
+//
+//    # Open a file in a browser window
+//    Open $FILE
+//
+//    # Open a URL in a browser window
+//    Open $URL
+//
+//    # Open the contents of stdin in a browser window
+//    cat $SOMEFILE | Open
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/pkg/browser"
+)
+
+func usage() {
+	fmt.Fprintf(os.Stderr, "Usage:\n  %s [file]\n", os.Args[0])
+	flag.PrintDefaults()
+}
+
+func init() {
+	flag.Usage = usage
+	flag.Parse()
+}
+
+func check(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func main() {
+	args := flag.Args()
+	switch len(args) {
+	case 0:
+		check(browser.OpenReader(os.Stdin))
+	case 1:
+		check(browser.OpenFile(args[0]))
+	default:
+		usage()
+	}
+}