updates to Exec()

Signed-off-by: Jeff Carr <jcarr@wit.com>

shell.go

@@ -259,6 +259,9 @@ func Exec(cmdline string) {
 	cmdArgs        := strings.Fields(cmd)
 
 	process        := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
+	process.Stderr  = os.Stderr
+	process.Stdin   = os.Stdin
+	process.Stdout  = os.Stdout
 	process.Start()
 	err := process.Wait()
 	log.Println("shell.Exec() err =", err)