Changes to unix(3)

Changes to unix:
commit 574c291a0b847a0bb8f7ec4a878bf1c0d7dd225f
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Oct 20 14:14:40 2013 +0200

    Markdown-ify README and add Travis-CI script

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

commit 6bc480869f6c9b46fc10d980e554a7e1744cb475
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Oct 20 13:56:28 2013 +0200

    Update aux files `config.{guess,sub}` and `install-sh`

    This updates the files to the versions bundled with GNU automake 1.13.3

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

commit ddfab51b890f772962f0c53149a98cd964bb08f2
Author: Herbert Valerio Riedel <hvr@gnu.org>
Date:   Sun Oct 13 10:17:54 2013 +0200

    `M-x untabify` changelog and unix.cabal

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