Changes to unix

Changes to unix:
commit a5aa36d7a86ccfea758fdeec39127d552f322285
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Fri Nov 8 15:48:18 2013 +0100

    `M-x untabify` & `M-x delete-trailing-whitespace`

    ...on recently touched files

    Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>