    * Copyright (c) 1994-2012 Carnegie Mellon University.  All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions and the following disclaimer. 
    *
    * 2. Redistributions in binary form must reproduce the above copyright
    *    notice, this list of conditions and the following disclaimer in
    *    the documentation and/or other materials provided with the
    *    distribution.
    *
    * 3. The name "Carnegie Mellon University" must not be used to
    *    endorse or promote products derived from this software without
    *    prior written permission. For permission or any legal
    *    details, please contact  
    *      Office of Technology Transfer
    *      Carnegie Mellon University
    *      5000 Forbes Avenue
    *      Pittsburgh, PA  15213-3890
    *      (412) 268-4387, fax: (412) 268-7395
    *      tech-transfer@andrew.cmu.edu
    *
    * 4. Redistributions of any form whatsoever must retain the following
    *    acknowledgment:
    *    "This product includes software developed by Computing Services
    *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
    *
    * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
    * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
    * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
    * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
    * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
    * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
