implement a shell for module

components/finsh/shell.h

@@ -1,11 +1,26 @@
 /*
- * File      : shell.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2011, RT-Thread Development Team
+ *  shell implementation for finsh shell.
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ *
+ *  This file is part of RT-Thread (http://www.rt-thread.org)
+ *  Maintainer: bernard.xiong <bernard.xiong at gmail.com>
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes